No flames here. We do the same thing. I usually just give the nose of the MH a quick scrubdown to get the bugs off on site -- the sides and rear don't get that bad unless it's raining, in which case I'll do a quickie wash all over. I don't spend as much time on it as I would at home, but I do get the yucky stuff off. I always see several other people doing this on site, particularly in love bug season. No one has ever complained that I've seen.