Our kids have to help clean up the fairgrounds in the spring, that "pays" their entry fees. At least half of each club is supposed to show up to get everyone's passes. Each leader also gets a pass. If you are camping, you get a car pass including in your camping fees. Parents and sibs can buy a week long passes to get in (doesn't cover rides) at reduced rate. I solved that problem by becoming a leader, Dh uses the camper pass and sibs are either in 4-H or enter something in the open classes, it is cheap and they get a pass too.
Oh, forgot to say, all cages/pens must be cleaned by 10 am every morning and the kids are responsible for keeping the animals fed and watered through out the day. Plus our kids must be there on show day to put their birds on the show table and if they are entered in showmanship, to also show themselves with their birds.