That's what I said earlier, Westwood.  At my favorite store an all-plastic scrubee is easy to find and I use them at home as well as in canoe country.  I don't think they keep any food residue on them if you rinse well, and I don't worry about packing them away wet.

I am not sure I would boil it, but I rinse it with boiling hot water when I rinse the dishes and call that good.

We have never gotten sick on a canoe trip.  We do filter our water.  When Spartan1 became immune suppressed (after the kidney transplant) I feared that the nephrologist would say "no canoe trips" but all she said was "use a water filter".  We were fortunate to have a nephrologist who actually had been to the BWCA--how lucky is that??   ;D

(Oh, yes!  I MUST have dry TP!  But I think that was another subject and sort of OT of this thread.)