Now that I have finished reading the thread I should say. Kiln dried pine would be ok for adult feeders but I wouldn't use it for breeders. Aspen is only slightly more expensive. I have a watering system that I got from reptile basics and it works great. You can find great tutorials on watering systems and rack setups on this site and others. http://www.reptilebasics.com/rodent-watering/
Mind if I ask why you wouldn't use it for breeders? Fumes maybe? It does put off a strong smell but I'm not aware of anything about the fumes being toxic...
Bruce Top Shelf Herps
1.0 Pastel (Gypsos)
1.0 VPI Axanthic Pinstripe (B-Dub)
1.0 Sable het Hypo (Flat Top)
1.0 Lesser Platinum (Sean2)
1.1 Lemonback (Einstein.Elsa)
0.1 Pied (unnamed)
0.1 Pinstripe het Hypo (Chopper)
0.1 het VPI Axanthic (Vanilla)
0.1 Spider 50% het VPI Axanthic (Serine)
0.1 Hypo (Bella)
0.1 het Hypo (Hooker)
0.1 Cinnamon (Nutmeg)
0.1 Normal (Jane)