the water from you FW tank? I've read where some people don't and i don't understand why not. If you have sanitized your system what is there to be afraid of??
I sanitize my tank and drink the water after going through a Brita filter. I cannot imagine trying to carry bottled water, now when I was a full timer for a couple of years and often take trips that last several months and are in remote areas. I have a hard enough time getting food without worrying about trying to buy and carry large quantities of bottled water.