If you don't mind spending a little money Blackhawk Tactical pants are very nice. Lightweight, kahki color, water proof (think sprinklers), don't stain much.
I bought 2 pairs this spring and they show very little wear or stains the whole season. Even in the 90 degree days I wore them and I stayed pretty cool.
Looking for blown Kawi 29HP DFI engine's fd791d, whole thing, intake, throttle body, and electronic's. PM me if you have something you would like to sell.