The vehicle is a Dodge 3/4 ton 4X4 service truck. Not sure that I could put enough mud flaps on. If I were going to make them, I would use old conveyor belt. Might put some on, but that still does not help in the wheel well area.
Re sprinkler. I have worked with Marlow Treit on a couple of projects and that is what he always preached. When going home, I have prayed for rain, but it never happens. We live in a subdivision that where the houses are on wells. The water rights are for domestic use only (no outside water). The water cops could get you for washing your car. In addition we are, again, in the middle of a terrible drought and live in fear of the well going dry.
I had thought of doing a good wash down using the water in the motorhome, but I think that would make matters worse, since you would not get the salt completely off and the moist remaining salt would really be bad. I have used the one car wash in Wendover and it is a real pain to wait in line and still not get everything off.
Jim