I guess the other thing is you could do if there's no place to connect to a hose is to carry a couple jerry jugs full of water and use a product like Optimum No Rinse Wash & Shine or Quick Easy Wash or DP Rinselss Wash & Shine, etc. I finally decided to try out the Optimum No Rinse Wash & Shine and I washed one small car (Toyota Matrix) and a F250 truck with just 4 gallons of water. The phantom grey Toyota that I washed showed almost no further signs of marring or halo scratches, etc. The F250 was already swirled up pretty good, so it was too hard to tell how much if any further scratching occured. This weekend I'm doing a S500 and an Excursion and I plan to use ONRW&S again. Next week I might be doing a Bentley Continental GT if things work out and I'll probably use ONRW&S again. It's a pretty neat product, but it's still very new to me.