Don't think about water, pray for a good wether!
You won't meet a road like everyone so on that pictures (cause I hope you are not crazy to go there). There are some villages with Coca-Cola during all your trip.:-))))
Get ready to spend a lot of time thinking about yourself wile riding through endless fields. It's not a New Zealand with a landscape changing every hour.
Anyway it's a good idea to start from Russia and please let me know when you will start, I'll try to tell about you to my friends that can meet you on your root. I'm planin to go to Altay, but probably I'll be there earlier then you. You're always welcome in Moscow, so just e-mail me.
PS: Look through the russian version of my on-line magazine on the next week, there will be a big article (in russian, sorry) and a gallery about my trip through New Zealand.