EDIT: Actually, on second thought, generally it doesn't seem more cramped to me than Seaside, although a few areas are a bit closed in due to the size of the homes. Plus, even north of 30A it's not a bad walk to the beach.
I think it may seem more cramped when you are going down the streets because the houses often have the cool courtyards -- but it gives you a nice outdoor private area!!
Our place is close to Rosemary and we rarely get in our car. (Maybe once to go to the grocery store.) But we enjoy the shops and restaurants in Rosemary. And now we have some great restaurant choices in Alys too! I think it's all what you are use to!