I was in the same boat a few years ago....racing D37.....moved to KY and it takes a while to get use to the trees...lol
Like he said....concentrate on finishing....
when you come to a group of riders sitting around, they are sitting there for a reason....probably a check coming up...check their number and compare to yours to determine whether you need to stop or keep riding....
I also agree with Brian on if you get stuck, crash or just get tired....keep moving....really hard to make up 15 minutes of sitting as opposed to 15 minutes of first or second gear cruising....