Hi, I been keeping chameleons for bout five months now and ran into many of the same problems, I use reptile carpet and is really good...
I got hold of a ficus plant at Bnq, I spray his cage about 3/4 times a day and it keeps the humidity just right...
The dripper was the hardest part, I did the " ghetto paper cup" trick and they just don't hold enough water, so all I did was; get a plastic box, pierce a hole with a point(I.e screwdriver) get some aquarium air tubing put In the hole, make a 90degree bend in the tube somewhere, then let it drip. The bend in the tube means all u have to do to speed up is move it in or out...
Hope something here might help,
I've found it hard to get good supplys for my Cham in the uk, if u no any good sites please post a link,
Cheers Aaron.