I have been to a couple of fields and stayed away from the pits unless invited by a pilot. They should be clearly marked and if I was flying i would defiantly want people to stay back.

At a funfly, a lot of the guys had thier planes parked under a big tent. Everybody could walk around them and check them out. made me nervious as I didn't want to trip over them.

Didn't help that I had my (then 5 yr old) son with me running all around.