The AF 992 is one of my favorites. I like the rear kitchen and the decent dry bath. There are a lot of AF owners who use their TCs while off the trucks.
I unload occasionally but I do support the under belly with (3) 2X4s on adjustable jack stands. I like the idea of having the extra support but its mainly to keep the TC stable while off the truck. The 2X4s and jacks stow neatly along the sides of the truck bed and out of the way before loading the TC, so its no big deal if you want take along a few items like this for the added support.