Not sure if great stuff is closed cell foam or not, but I would make sure that whatever product you use is a Closed cell foam to avoid trapping moisture.
You are not welcome until you have a Mav on order!!! LOL just kidding
Why would you need an AWD or the 4K tow if you use the Wrangler.
I know lots of the MN and Wisconsin owners were quite please with the front wheel drive handling the snow up there. You being in the Houston area I am sure not...
I would say it is avoiding the problem, I did not could care less about those features, they are not the reason I purchased the maverick in the 1st place. If fact I would rather not have any of those features installed on my Mav