I would advise against drinking uprocessed water, even in the PNW. I've seen too many critters and people doing their business upstream to ever trust a raw water source again. Having been through one bout of giardia, I will take every precaution to avoid it in the future.

As for powdered eggs, I always found them to taste a little chalky and distinctively processed. If you reconsitute them for scrambled eggs or an omlette, realize that they will have a greater tendency to leak moisture as they cook than normal eggs will. To help overcome the off-taste, I use the Lurpa trick, and add a suitable amount of hot sauce to the mix, salsa if I can get it, but tabasco-style is okay. Not all powdered eggs are the same, and the cheaper OEM type will taste more processed than what you get in the foil pouches from Mountain house for $5 a bag.

We missed an Un-Rep one time out on an IO cruise and ended up eating a fair amount of powdered eggs, powdered milk and crackers. Thank God we didn't run out of real coffee. Fortunately I had a stash of sardine tins packed in mustard sauce. Opening one of those, I would eventually get the whole berthing compartment to myself. You can only eat so much powdered reconstituted scrambled eggs, you know.