I hope this doesn't sound judgemental, as it's only my opinion based upon the information you've presented.... so take it with a grain of salt, okay?!
I agree that it seems likely that something else is going on.
The way you've described his actions and the things he's saying make it seem very passive-agressive to me.
- Does he resent the time and energy you've spent planning and perfecting this vacation?
- Would he prefer some "alone" time with you -- something sharing a resort room with your kids wouldn't allow?
- Is there some reason that Disney rubs him the wrong way?
- Is there some place he's always wanted to go and trips to Disney don't allow for him to go there?
My husband is a big fan of traveling, but only mildly interested in Disney. (He likes it, he'd just prefer us to see *many* other places too!)
I just had a good heart-to-heart with him and explained my reasons why Disney was important to me and what my fears and concerns about traveling to other places has been in recent years. We got it all out in the open and really "heard" each other. In our case, we decided that I could continue going to Disney with our son and with girlfriends, but that I wouldn't drag him along AND I would plan and budget for trips to places he'd enjoy seeing, like Washington D.C., Alaska, Quebec, etc.
Getting it all out was a big relief to both of us.
Eileen
PS - I just saw your post about your DH being "Sully-sized" and it made a little light go off in my head. Could he be concerned that his size will keep him off the rides? I know that worried me my first trip and I've always found that Disney's rides accomodate the larger guests very easily. You might want to attract his attention to the "sticky" thread called "Too Big for the Rides?" It might settle his fears.... (if that's what's causing his angst.)