We own two cottages at the Cottages at Camp Creek and have two children, ages 11 and 13. It's an extremely family-friendly community. The beach is just across the street. You go to the front of the entrance of the cottages, cross the street, turn left and walk past about 2-3 houses and take the beach access to the beach. It's about 200 yards/5 minute walk. Very easy. It's easy to carry beach chairs and a cooler on wheels. The pool is very big and it serves a small community so that is very nice. If your rental doesn't leave beach/pool stuff, then you may want to bring some air mattresses for the pool because they can be pricey right on 30A (although they may be cheaper at the supermarkets).
A typical day for our family is:
I get up early because I like to and I sit on the porch with a cup of tea and scone or something and read until the kids and my husband wake up. The porches are great.
When our kids wake up, they loike to go right to the pool and look for frogs and put them in buckets, name them, show them to us, then let them go. (early morning)
We go to the beach in the morning when it's a bit cooler than in the afternoon. There is a little stream from the dune to the water that the kids build sandcastles around. The adults bring beach chairs and read.
For lunch, We eat lunch back at the cottage (we sometimes get ready-made food from Public, about 4 miles from the cottage) or we eat out. We prefer to eat out during lunch because it's cheaper than eating out at dinner. We go to Angelina's during the weekdays for an inexpensive lunch special (e.g., $4.99) or pizza from Brunos (which we hear has a great lunch buffet special but we haven't tried that) or lunch at Red Bar, or fried oysters at Seagrove market or Hurricanes at Seaside. Also, the kids don't like to sit in restaurants long so we sometimes order a take-out meal and then complement it with our own grocery store bought cans of soda pop and dessert (to save money) and eat it at home or at the beach or at a park or on the green at Seaside. I've heard there's quite a bit of construction going on at Seaside now, so I don't know how inviting it will be this year, but it's worth finding out. Most of the cottages also have outdoor grills.
Bruno's pizza at Seagrove delivers but remember that the entrance gate closes at 6:00 so you'll have to go let them in.
We sometimes take the kids to the dollar store in panama city beach (there are lots of them) so they can spend about $2-$5.00 and be entertained buying souveiners (sp?) for quite a while. Bring a book so you don't get bored. We typically do this in the morning and go to Thomas's donuts on the way to the dollar store. A tasty, cheap breakfast (it's kind of a dive but we love it).
We go to Seaside in the evenings for concerts and outdoor musics. This year, I've heard Rosemary beach (which is closer) has them, too. I also hear they have sandcastle building classes during the week. The SoWal calendar may have this information. Bring a blanket and just sit on the lawn. Our kids like to get ice cream at Seaside, but it can be pricey. The beach at Seaside behind Roly Poly sandwiches is a public beach.
We watch the sunset from the Cottages at Camp Creek beach area just about every night. We bring home-made ice cream sundaes in throw-away containers. You can also bring food and drink to the beach but not in glass containers and be sure to clean up afterwards.
We used to catch tiny crabs at night at the beach, but we haven't done it in a while because it's not good for the turtles to use lights at the beach. I think it's OK if you use a red light flashlight. Bring a bucket to keep the crabs in.
When it's dark, we like to float in the pool and watch the stars come out. Since most of the cottages at Camp Creek are one story, you get a great view of the sky. When it's cooler, we sit in the hot tub and watch the stars come out.
We usually do a puzzle as a family when we're there (500 pieces is a good size for a week at the beach) or play games (Outburst Junior is a fun easy-to-learn game for all ages and even your new friends and neighbors will want to play).
We love big Kahunas but have only gone in August when it's not busy. Expensive (e.g., $25 ticket) and the lines may be long for the water rides at peak times. It's fantastic in August when there are no lines.
We go to Grayton Beach State Park which is wonderful and $5.00 car. You can stay there all day because they have bathrooms, showers, grills, picnic tables. It's a state park so you get to see how gorgeous the dunes are when there are no buildings on them -- what the area looked like before all the development.
Deer Lake State Park is great but the lack of bathrooms (just an outhouse or two quite a distance from the beach) makes it hard to stay long. But well worth seeing -- I've never seen anything like the Deer Lake area ever. Gorgeous.
There's a video store in Seagrove in case the kids or adults want to watch a movie or two.
Hope this is helpful. Just email me if you want more information. We LOVE it there and can't wait to get there ourselves in July (and again in August, November, New Years, late February, April...)
I hope you have a wonderful trip 
