you can solid axle swap anything as long as you have a couple beers and a saws all.
but honestly you dont absolutly need an sas for expedition camping work. i have tossed around the idea of swapping the ifs on a newer toyota alot of times but i keep comming to the conclusion that i dont really NEED to. the trails i have been on suggest that a solid axel is better, however; with that said they are just that. trails, not roads that lead to far off places. they are a short cut between a couple logging roads.
on the other hand there are many belifits, less moving parts, easy repairs, etc. and that i agree with, SO if you plan on doing a solid axle swap i believe that you would want a dana 44 or bigger with a left drive for 96 and newer models, or a toyota 8" for 95 and older models. if you get an 05 or newer it could take alot of work because so far i have only seen two, one personal and domello off road did one but they used a curry 9" in the front which is pretty stout.
personally if i was going to solid axle swap a truck i would do a 94-97 toyota, that later models espicaly because its pretty streight forward and dana 44s are a dime a dozen, but i would swap the rear as well just for symetry. for a 94 and 95 i would do it with 8" axles.
now then if you want an exedition truck, keep the ride height down, and get skid plates. this will keep the stability of the rig on off cambers but still allow you to go some awsome places, make sure the suspension is flexy, its better to have something that flexes well rather than some of these guys that compensate for unmentionables with 17 or 20 inch lifts of their fords (i mean come on guys, your not fooling anyone.) if your tires touch the ground, you have better traction, where as ifs, as demonstrated by the hummer, 4runner, and any other ifs vehicle, front tires like to lift, and quite easily.
those are my 2 cents.