Are you talking about the cancellation insurance?
I WOULD get it - you never know what MAY come up.
A couple years ago I had a trip all set w/about 1000.00 into it. Our van died - a few other things came up and basically the trip was off.. (we STILL haven't gotten back to DW

) I was able to cancel after the cut-off and get everything but the deductable back.
I used to work for a 24 hour emergency office for a
travel agency - you cannot imagine the stories we'd hear... and how horrible we felt when someone had not purchased the cancellation insurance. That's why I purchased it - I didn't want to be the one feeling horrible.
Spicycat is right tho' READ EVERYTHING THOROUGHLY before you sign - make sure you know how to handle everything. I'd gone directly through Disney at the time.. (
travel agent rate..

) But from what I've been reading you're looking at
AAA. Just engage them in conversation about the insurance. Ask LOTS of questions...
Just my 2 cents - but since I'd been through it I thought I'd throw it out there.