I have a wood burner in my living room and I keep 2 giant leaf tail geckos (Uroplatus) and I have no issues. I live in a split level and the Chams are up and down a level without issues (dehydration).
I have gotten my Chams used to either feeding from a container or my hand. IMO the benefits are monitoring food intake and no loose crickets at lights out.
FYI my Veiled is the same color and reacts the same, take him out and he's brilliant and put him in and he's grey. Funny thing is, when he was in a smaller cage he was more colorful. I moved him to a bigger cage and he went grey. The only thing that changed was the location of his cage. It is...
From what I know, and I'm no expert, the meal worms should only be offered as a treat. They are high in fat and there exo skeleton in not easily digested. I'm sure others will chime in.
Dubias are a great source of protein and can be used as a staple.