I agree with Donna (Rosebuds) that your Chuck looks like he could have come from Nevada. Just curious about his femerole pores. Are they big?
I would think that NW Oregon will probably yield very few basking days outdoors, so UVB's a must!
I am pretty sure that the flowers humans can eat would all be safe for a Chuckwalla. Never Oleander, and I have heard that Lantana is not good, though mine have occasionally nibbled on it. NOT their favorite.

