UTH on Both Sides?

Any disadvantages to doign this, keep one at 95 and one at 85, to avoid the use of heatlamps and low humidity?

None that I can think of. That's what I do for all my BP enclosures and it works perfectly. Of course, you need two thermostats (or a Herpstat II), but it's well worth it to know that your temps are right where they should be. It's especially helpful to have one on each side in really cold places...like here in CO. :)

great to do if you keep temps low indoors!

I use 2 on each of my tanks :D Works like a charm ;)