Cleo, I"m told Vegas is very casual...
but unless you want people to think you are from Iowa, it might be nice to dress up a little in the evenings. Most people at TAM1 wore jeans. But G6 had some really neat fashion things going on...where that girl must shop, I gotta get out there for a visit!
I'm planning on being a little nicer for the workshop, and something nice, but probably pants for Penn and Teller. I wore a lot of black TAM1, but I have a lot of that anyway for when I have to work in NY, or some other artist thingy.
Luciana had some cute flirty skirts, and I dont' remember anyone objecting! Moe has said in Vegas flash and glitter are great. It's anything goes! I hope to be helping out LInda some too, so feel I should look a little nicer than tshirt and jeans while I'm there. Not a suit, like you were going to court, but some nice khakis...
What I would say is that wear what you want. There was a shortage of women, and even if the guys all wear jeans and a tshirt - they don't seem to mind if the women dress up a bit.
shorts, hey is you've got the legs guys!