Re: T. S. Dennis
Check your cottage rental agreement. Many of them will allow you to cancel without penalty once the hurricane warnings start getting posted. Car rental should be no-deposit and easy to cancel.
Hold tight on the plane tickets until the last minute. The airlines will generally get a lot nicer about waiving change fees and giving you ticket credit once they've got a better idea of where the storm is headed, and which airports are going to be affected.
Here's what happened with the airlines after Ivan:
http://www.usatoday.com/travel/news/2004-09-16-hurricanes_x.htm
Delta-
Delta warns cancellations and delays are likely at many airports.
Passengers can make changes to tickets without penalties for travel scheduled to travel to, from, or through affected cities on Delta, Song, Delta Connection, or Delta-coded flights. Waiver eligibility dates vary by destination, but rebooked travel must be completed by March 1. Additional collection in fares may apply.
Airports covered by policy, for travel through Sept. -30: Albany, Ga.; Baton Rouge; Birmingham, Ala..; Brunswick, Ga.; Cancun, Mexico; Columbus, Ga.; Cozumel, Mexico; Dothan, Ala.; Fort Walton Beach, Fla.; Gainesville, Fla.; Gulfport/Biloxi, Miss.; Jackson, Miss.; Jacksonville, Fla.; Mobile, Ala.; Meridian, Miss.; Montgomery, Ala.; New Orleans; Pensacola, Fla.; Panama City, Fla.; Tallahassee, Fla.; and Valdosta, Ga. Passengers must reschedule by Oct. 7.
Northwest-
Passengers with confirmed tickets for travel on Northwest between Sept. 14 and Sept. 19, to, from or through any city in Alabama or other affected cities may reschedule their trip and complete travel by Oct. 3 without penalties or fees, subject to availability. Northwest will accept unaccompanied minors to affected cities through Sept. 17.
Current affected cities: For travel between Sept. 14 and Sept. 19, Northwest's waiver includes: Baton Rouge; Fort Walton Beach, Fla.; Gulfport/Biloxi, Miss.; Jackson, Miss.; Lafayette, La.; Laurel/Hattiesburg, Miss.; New Orleans; Panama City, Fla.; Pensacola, Fla.; Tallahassee, Fla.; and Tupelo, Miss.