Got a question for ya regarding your sleeping situation before I can suggest anything really, what are the temperatures going to be around when you plan on going? Also what is your budget? Does it have to be UL?

Treating water do you mind chemicals? If not there are products like this, and similar. chemical treatment

There is a wide variety of filters out on the market. A lot of them have been discussed in recent threads, in depth by people who have a lot of experience with the filters. Me personally I always boil. I always either start a fire where prohibited or have my alcohol stove with me. I am also a bit more trusting of water sources - so far haven't had a problem smile

I have been thinking about buying one recently and have been looking at this Frontier Pro . Its lightweight and gravity fed and can attach to a platypus or water bottle.
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"To me, hammocking is relaxing, laying, swaying. A steady slow morphine drip without the risk of renal failure." - Dale Gribbel