Excellent research StuntMan. I've been experimenting on this topic also. I intentionally practice outside when it is humid and windy, be ready for anything, ya know? My disc golf talc bag helps, and I have a white nylon glove I ordered from yo yo nation, that works pretty well. Something I've tried recently is different string. I haven't used my bamboo thread for a while, so I twisted some string up 75% bamboo and 25% polyester really tight (2 size 10 bamboo crochet thread, 2 polyester sewing thread). The result is very similar to StuntMan's Gold Bond method; doesn't wirewalk as well but regenerates just fine. It does play in the humidity much better than cotton.
We need to start a care package for Mike's next trip into temperate climates.