Personally, I would way rather just drop the belly pan than be annoyed by working around it. I always just figured if you wanted to do pretty much anything under a tj you have to remove the belly pan first.
This is how I do it, removing pan and reinstall can be done in about 15-20 minutes
1) remove 4 13mm nuts in centre of bellypan
2)using jack etc support weight of tranny /tcase on a jackstand behind the bellypan.
3)place something under the belly pan so it wont fall (I use two milk crates and blocks of wood)
4)loosen 6 belly pan bolts (19mm) and thread out about halfway.
5)confirm that weight is on jackstand, not bellypan.
6)remove belly bolts and lower pan
To reinstall, raise the trannyé t-case slightly (one inch or less), bolt up the belly pan, then lower the powertrain onto the pan and reinstall the four small nuts.
I thought it was impossible to do much of anything without removing the pan, but I guess some people would rather work around it.