I agree with everything above...
Some tips I've gotten from touring:
If possible, arrange for someone to receive packages for you. No matter how much you think you're under packing, 9 times out of 10 you're over packing. You will want to lighten your load. Shipping home is a great alternative.
Keeping two suitcases on you isn't always a bad thing. I personally opted to travel with two half-empty suitcases. They were light and easy to manage, and I never had to worry about wrestling them closed. Also, you will buy things and this leaves room for those things you pick up along the way.
You will lose your vanity quicker than you think. You will all see each other in the same clothes over and over. You will stop caring. Also, I tend to bring clothes in one color theme (for me it's gray, black, and blue) so that everything matches with everything.
Make sure you introduce yourself to the locals you will deal with in each city and realize that you might have to explain things a little more in-depth then you usually would. While they probably do know SL and SR apart (and a whole boat load of knowledge about the area) they do not know anything about your show.
Ziplock bags are key. Not only will you need them if you are flying for any carry-on liquids, but they also keep that shampoo bottle from bursting in your suitcase and ruining 3 days worth of clothes. Also, having a laundry bag can be crutial. No one likes it when the dirty underwear is right next to the clean pair.
Budget yourself, but don't be too strict. Down time might be far and few between, so treat yourself knowing that maybe for the next few days you'll eat a little cheaper (or only have 1 drink
)
Try and sightsee a little. It may not work in every city, but being able to get out and explore is the only chance you might have to "get away" from work. After awhile you'll realize that while you've "been" to a certain city you don't remember anything about it except what the hotel carpet looked like.
Technology that has gotten me through: my iphone (music/maps/all the apps), a Kindle (no lugging around a ton of books), a camera (touring is crazy which makes for the best moments to capture), also a skype account is free and has been a great way for me to talk to my loved ones while away.
If you aren't one of the people who use their phones as alarm clocks (I am, but there are plenty on tour with me now who aren't) invest in a small travel alarm clock. I've seen power outages take out the clocks in the hotel rooms and you just can't always trust a wakeup call.
As said before by others: be open to everything and have a blast. Touring IS hectic, but do what you need to make it not just a 24-hr job for yourself. Work hard, play hard, and have a great time!