DIY desiccant packs...

I have access to a fair amount of bentonite clay in powder form. Would DIY sacks of this stuff be good for drying and curing?

I wouldn’t think so because they only suck moisture out, you need something that regulates it, to about 60% humidity or so. Boveda packs or integral boost packs, there’s some other ones as well that do 2 way humidity control