zentara, I think you are over-engineering. The entire system you want is already in place. Companies like
Crystal Springs provide everything (at least where I live). A simple write-in campaign to Crystal Springs (they seem desperate enough, given how obsequious they are with us every time we threaten to cancel) and, voila. No pail construction. No lugging to/from a truck. And, you can get it chilled, or in a warm, mulled cider condition. OK, near boiling may be a bit much, but after the third flagon, are you really going to notice? :)