Have fun in Vegas! I have never been -- friends want me to go for my 21st bday. We shall see.
I have been lucky that I've never had to board Jackson. I'm not sure he would take to it well at all. But if I did have to, I'd probably bring a shirt of mine so he had my scent with him (he likes to lay on my stuff when I'm not home already) and his own bed from home. And then, just like the things you said... I can't think of anything else. Jackson won't chew on anything while he's by himself so I think bringing a bully stick, etc, would be pointless but I'd probably do it just in case.
Good luck