I assume you are referring to the typical “boondocking” or “dispersed camping” on BLM land. Here in the west we have a huge amount of areas. We boondock quite a bit. Avoid 5th wheels or TT much longer than 25-30 ft. 5th wheels are too high to get through areas with low branches and anything much longer than 25 ft becomes too hard to maneuver in tight spots. As far as suspension, etc. just take your time and have a good set of tires with a couple of spares.
Tie or secure shut your cabinets or else all of your pots, pans and dishes will end up on the floor. Cornell makes almost unbreakable bowls and plates.
Also, a 4wd is almost a must with at tires. When it rains you need it to get out but some places you will still be stuck until it dries out.
Solar is the best thing ever! You get to enjoy nature without the noise of your generator. We still bring it along if needed for ac. We have the 400 watt Renogy system.
Also, Weboost Drive Reach is a godsend if you have teenagers. Installed the trucker antenna on the exterior and bigger antenna on the interior. We have T-Mobile and it made all the difference last year when we were mostly boondocking over the western us for six weeks.
Just a few suggestions if you plan on doing a lot of boondocking to make your life easier.