Larger gray tank capacity trailers

JMO but tank capacity is highly overrated as in almost every case you're not going to have enough anyway to last an entire trip, whether it's fresh, grey, or black. With large capacity tanks, particularly fresh, you're also going to be towing far more weight than is necessary. The key instead is to have a means of getting more fresh water and transferring it into the trailer's FW holding tank efficiently, off loading grey water anytime you want, and off loading black water if necessary. All are entirely possible, you just have to decide which methods would work best for you. For me, I long ago settled on a set of inexpensive 7 gal Aquatainers for retrieving fresh water and a potable water pump for transferring it later into the trailer tank. I also have a few other 'Tainers marked for grey / black water use and most often just off load grey water by gravity but use my FloJet Waste Macerator pump to macerate & off load black water if it's ever necessary into those same GW/BW containers which I can then empty at my convenience. Using this method our trailer's 30 gal tanks offer plenty of capacity. Pics are in my gallery. :)