He's finally been moved to the tub, except I made a blunder (though I think it was unavoidable). Washed all his belongings that would be moved to the tub (water bowl, decor, ect.) and the humidity I had been waiting patiently to go down for over a week at a nice 60-70% now shot right back up to 100%.

I just have to cross my fingers that it dehumidifies in a decent amount of time, because I've already moved everything plus unplugged the original enclosure's heating and I don't want to stress him out further with a bunch of back and forth.