Church Family Fun Fund Raising?

We are wanting to raise money to send our youth group on a trip. We are thinking about having a family fun day with activities our budget is very tight for this because we are wanting to raise more money then what we have to take a trip. We were going to rent a inflatable slide and do other things but I think this is out of out budget. So far we thought up bobbing for Apples, Sack Race, Cake Walk, we will be selling food and tickets to play the games. Any ideas are appreciated.