RE: Water hose taste
I use the white hose for my trailer and while it doesn't have the "garden hose" taste, the flavor is still a bit off. When we head off to our camper for the weekend, I always fill up a jug of water at home and bring that with us to drink, we use the campsite water mostly for cooking or cleaning. I personally feel the safest bet is to skip the water completely and bring some quality beer but, then again, I may be a bit prejudiced as beer is my business.
As far as the TP goes, I use the RV stuff, a four pack is like $2.50 at the local RV store.
Cheers!