Hey, I ordered a new cage from RBI for my female RTB.. I had read that some people use indented kraft paper, is that correct?

I also ordered a rack for my BPs, which I'll be using aspen in.. but for the RTB cage I feel it would be easier to just lay down a sheet of something, instead of a bunch of loose aspen shavings.
And I feel like the newspaper I've been using isn't a clean as something like kraft paper, and I hate all the print on it.

Also, if anyone uses this kraft paper how do you get the humidity up in the cage?

Heres the link to the cage I ordered:
http://reptilebasics.com/2x4-Cage-12-High-p-16237.html

I got it with an Ultratherm heat pad, a Helix thermostat, and a temp gun.. I have a big soak dish for the cage too.. Anything I'm missing? Shes been doing well in the screen top terrarium, but the RBI cage seems better, and it looks good.

I'm donating her old cage to the Phoenix Herp Society for rescues after I get my RTB moved out and the cage cleaned