fawk that... drop it.. put 22" spinners on it... and put an actual coffee can on the back and spray paint it chrome... and then youll be an extreme offroad rig pulling extreme rice, now THAT will get you some attention
well... I'm not meaning to go crazy on size... but use something more reasoneable for trailer tires... maybe 235's and maybe widen the stance a bit....
I did a spring over axle lift on my Jayco Popup 4 years ago. The rear overhang is my biggest problem, I'll probably get larger tires next spring. Since we want to go past the "normal" camping spots in the National Forests getting more clearance was necessary.
Still have to use a 6" drop bar to keep the trailer close to level, slightly nose high when pulling.
It can be done, wheel wells will be the biggest (or littlest) problem. SOA can be used, then lift blocks as long as kept reasonable, like maybe 1-2". Tiny wheels go with tiny hubs, but a little work with a trailer axle parts book will probably show some hubs with a 5 on 4.5" pattern, and matching bearings/seals to fit your existing spindles. Shoot, my local TSC has complete axle assemblies for about $100 with this pattern.
Leveling the trailer would probably NOT pose a problem, assuming you are pulling with a lifted XJ, no drop hitch required.
If you thing you're alone, you're not. Check out this FACTORY lifted camper.
Dexter actually sells a spring-over kit for their axles. It probably wouldn't give the lift you want, but you might contact them about possibilities. I've heard they are pretty good to work with. If you have torsion axles, I think you will be framebuilding to raise the trailer.
You can connect up with some people that have done the spring-over on the forum at www.irv2.com