Overnight is so short, you could pack water storage on the canoe unless you are porting a distance. For backup, iodine tabs followed by vitamin C is the old standard for parasites.
You'd need to look up effectiveness for giardia since I forgot.
I have a Sawyer brand filter and a Berkey. It's nice to have options that weren't available twenty years ago.
BTW, if you decide to go with a Sawyer, make sure you.slso get their Extractor. Is still under twenty dollars and bee stings are common..they work well when used correctly and immediately.
HC
