Thanks again for all the replies!
We do have a food dish for the mealworms, and will take the advice on rehydrating them (we've been tossing them out because they look dead - but could be "sluggish).
Temperature should be okay - we have a UTH and a red light above which seems to be keeping the warm side in the mid to high 80's.
I can let them sit and adjust, but we have three boys who are chomping at the bit to take the little guys out for a spin - so we probably have two stressed leos and three stressed boys