Humidity Control in a Rack System

Just one question than in regards to humidity within a rack system.
If the temp. requirements are similar but one species requires less humidity than another, (eg. BP and a hognose, both can use a basking spot of 88-92 and ambient temps are about the same but hoggies humidity is 30-40%) is there a way to modify one of the bins to hold less humidity? Like maybe drilling holes in a certain area?

Nahh, I just supply a larger water bowl for the BP in my rack. And when she goes into shed, I mist 2x a day.

I should probably refine my question since I may have been a bit vague.
You see right now my BP has a steady humidity of 60% it rises and falls slightly throughout the day, however if I was to house a species in this enclosure that required the same temps but less humidity Im not sure how I would modify it to keep in the heat but release some of the moisture. So with a rack system that has a basking spot in each enclosure of 88-92 and ambient temps of 78-85, there are lots of species that enjoy those temps but they seem to varry when it comes to humidity, and plastic enclosures realy can hold humidity well.

Am I making sense? Cause if Im not just slap me in the mouth and tell me to stop it. :lol:

I hear what you're saying.....the humidity won't be a problem. I keep a BP, hognose, corns, a savu python, a african house snake, and my Sonoran BCIs in my rack system. For those who need more humidity, I just give them a bigger water bowl and mist them when needed.

aah ok I got it. I shoulda figured this one out on my own. More humidity=bigger water dish closer to heat source, less humidity= smaller water dish farther away from heat source. Thanx David.

No problem. ;)

if humidity is still to high, drill more holes (or melt with soldering iron) preferably close to the top of the cage.