with no van yet, backpack, i wfp tops front, then go round back usually. then back to front bottoms. ill have to get a stopper on , either aquadapter - or tap fitted onto hose. easier to wipe ledges. ill look into getting a van set up, save lugging 25 litre drums about.
ill look into cheapest way to produce pure via van while out working, or keep to the ro at home and fill van in mornings when going out.