I forgot to add, ours is in a 4'x18"x14" tank with a mesh lid. Climbing seems to make them happy, we have logs for ours which get a lot of use every day. Our big male is 8'7", and he is happy with his enclosure size.
Have no clue if they musk, ours never have, nor have they shown any inclination to bite. They will put on quite a show for you though, and typically move a lot with their necks in a seemingly permenant s-curve.
I do not know if ours are typical, or an exception in this species, but on the whole, they seem very alert, inquisitive and interactive. I already know they learn faster than our cat. LOL.
Take care, and enjoy ..