every time i go camping/hiking/backpacking, i wear one of my Utilikilts. some campers live by the term "cotton kills". but it is not like the fiber will strangle you in your sleep if you take it with you. besides less than half of the UK is cotton (unless it is the Workman model). it dries quickly cause of all that polyester in it. it doesn't restrict the legs at all. i've never had a problem with bugs under my kilt. i might avoid a kilt under super cold conditions, but other than that, i won't take anything else.

the only time i am not regimental is when i am backpacking. i wear trunk-like/boxer-brief things that are made from micro-fibers. they keep my junk from banging around, and they wick away moisture, and prevent chaffing. and i wear gaiters to protect my lower legs.

the ideal fiber though for camping and such is still wool. it is the most fire proof of all the wearable fibers, it breathes well, it holds heat in regardless of moisture content. and it dries quickly. PV is said to do the same thing, and be cooler (of course PV in a fire would melt and burn, so avoid hiking in fire).