Dirty underneath

It warmed to just above freezing yesterday, which was enough to melt all of the snow off of my truck (and other vehicles around town). Underneath all of the snow and ice, is a thoroughly disgusting layer of filth. I would estimate that I have washed my truck MAYBE 10 times since we moved here almost three years ago. Which is a big switch because my truck had a bath faithfully once per week when we lived down states. There really is no point in washing it here. In the winter, you just cant because there is nowhere with 1) a hose, 2) indoor were its not below freezing, 3)unlimited water. Then during the four months that encompass spring, summer, and fall, there is so much mud that even if you wash it, it's just dirty again in five minutes. Also, the dirt here is mostly sand, so when you wash your car/truck, it's like giving it a nice sanding job. It puts tons of little scratches in the paint. So last year I had decided that I wasnt going to wash it again until I moved out of here. Then I would get it washed, buffed, polished, or whatever it took to get the paintjob restored. Well, since then, I've decided to stay for 4 more year, so that plan isnt really feasible anymore. Maybe I'll just sell it...the blue book value on it is more than I even paid for it brand new....I've seriously been considering it. What do you think?