Rattler,
Sounds like you'll have a busy walking 2018!
I've used a Katydyn filter for years. I always pump/filter my water but I think you'll find a variety of opinions on the forum.
With regards to ditching the stove, even on hot days, I like to stop around lunch/tea time for a coffee. Having grown up in Asia, the 3-in-1 type coffee you find in Asian grocery stores work fine for me.
Although I'm pretty much sick of them, the store bought dehydrated food works well for me, especially since I can eat out of the bag (and not worry about plates, etc). Just boil water and that's it. Since I basically just boil water, my JetBoil has worked fine for me for years. It's quite light and compact.