Hey, just got back from the Salt. There are lots of H2o sources down there right now. Cibeque, Canyon Creek, Yankee Joe, Cherry Creek, Coon Creek, Chalk creek to name a few. I also think that water filtered from the river has tasted fine in the past.
As for snakes. They are active right now and they are pretty common. I have my dog vaccinated abainst the typical hemotoxin buzz worms. She did get struck at twice by a big snake up near the cabin at Cherry Creek a week ago. Glad she's a quick one! Last year she was struck at by a 6-8' long Mojave Green on river left just above Medicine Creek. The vaccination does no good against the neurotoxin of the Mojave and she would have been dead meat if she was hit. I would suggest having the dog vaccinated or keep it close by or on a leash. Have a great trip!!