I went to the main site and looked for the 2013 Resources list.
Then I did a page search for "water" so I didn't have to read the whole page. I found this (in addition to some info about Gerlach having some trash collection resources; $10 for the first bag; $5 for each additional bag--very cool).
Gerlach Town Water Sales and Disposal Drop Off Burning Man Festival 2013
The Town of Gerlach will be selling potable water for RVs and portable water containers. We will have containers for sale on a first come basis. 15 gallon containers are $45.00, 6 gallon containers are $20.00 and 7 gallon containers are $25. Free water when you purchase a container from us! We will not be taking reservations for water sales or containers.
We will have multiple filling stations in front of the town shop located at 330 Short Street. Signs through town will help you locate the water station filling area. Our rates remain the same at $.50/gallon up to 100 gallons, $.45/gallon for sales above 100 and less than 200 gallons, and $.40/gallon for sales greater than 200 gallons.
We only accept cash. An ATM machine will be available for your convenience.
Water Sales Days and Hours of Operation
Mon., 8/19 – Thurs., 8/22 9:00 am to 5:00 pm Fri., 8/23 - Mon. 8/26 8:00 am to midnight Tues., 8/27 & Wed. 8/28 9:00 am to 5:00 pm
[For more on this, and trash collection]http://www.burningman.com/preparation/r ... fRT3OAaV5E
Some camps supply group water. If they don't list it as an amenity on their website or in their communications, you should figure it's a "no" (and that they may roll their eyes a little). It doesn't technically
hurt to ask, but almost all camps are very explicit about what your dues pay for, that's all.
I would not (personally) ask a non-group-water camp to think of me as a special case, but if I were friendly with people within the camp I would negotiate with 1-3 people in the hopes of obtaining a 2.5 gallon suitcase or two from each, and pay for it at the event with cash and cocktails.