I don't mind the deli cups for shipping but never for a show. We take a small cage with us to take anything home. The cage has limited vision to help reduce stress and is large enough to keep the cham comfortable. That's if we get anything. I agree that often they look pretty stressed at certain...
Dubias can't climb smooth surfaces so any cup will do. Maybe try using a shallower dish that Loki will accept. I sometimes have to leave my cham (Peanut) alone for a while for him to eat dubias because he waits for them to move around before he will take them and they won't always cooperate...
Peanut loves checking out the neighborhood but the Brevs just hide from the world. I don't blame them though. I would hide from the world if I was only two inches long too!
Pet Tech MagNaturals Replacement Magnet is a great magnet for attaching branches and they can be purchased from LLL Reptile for $3.
I wouldn't suggest roughing up the surface of the wood before gluing because then you have less surface contact. I always go smooth as possible.
I hope this...
An idea that you can take or leave but my pygmy chams love the cork bark that I have leaning on the back glass of the tank.
The other thing is that they rarely come above the "canopy" to bask in the light. They will at times but they usually like to stay hidden so you might want to expand...