Matt, whining if you don't receive an answer (within 18 h!) is bound to stop responses from any but the most forthcoming folks. And doing some homework yourself helps, too - check out the caresheets for ambystomatids at Caudatecentral.
Misting is spraying water, especially . Don't overdo it - many Ambystoma are kept too wet. Providing a gradient of soil humidity and assorted hiding places should tell you which humidity is most preferred. A water dish isn't necessary, especially if the soil allows digging - there's a reason why these guys are called mole salamanders...
Best wishes,
kai "I don't spell-check either
"