Wow, this is a lot of preparation! I wish I had time to prepare like that, you guys must run great games.
If you don't have time to draw maps beforehand (and draw the horrible ones first if you can) then WET WIPES!
I have not been to a convention where I haven't gone through all of my wet wipes, since other GMs steal then all the time!
Also, I definitely second point 10, I have a $100 tablet which has an Amazon app for d20pfsrd, which is absolutely vital!
fun,fun,fun!