The important thing is to have either both wheels totally off the ground or totally loaded (off the ground probably easiest) when doing work on the sway bar. If you have one wheel on the ground and one off, the sway bar will be wound like a spring with a lot of stored energy - that makes it difficult to turn the bolts, and when they come loose, you could get hurt by the sudden release of that energy,
The bolts can be very hard to turn - they are made that way on purpose (some are not that tight, others feel like they're going to wring off when you are turning them and will give your hands and arms quite a workout). Highly suggest you put anti-seize on the threads when putting them back in.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs