Fund Raising for Hunt?

Hey everyone I am 15 and have been planning to go on a northern big game hunt in Canada for Caribou with my longbow. I have saved over $1500 in the past couple of years not thinking I would be allowed to go, but this year, my parents decided that if I made the money I could go and they would pay for the airfare (I live in Texas). I need some ways to get a couple thousand more...three to four thousand would be prefferable...and would like suggestions on how to do it. All I can come up with besides a car wash is maybe setting up a stand in front of Sportsmen's Warehouse or Cabela's and having people put money down on if I could make a shot anywhere from 20-45 yards, and if I hit any of the targets, they will pay money(of course if I hit the 45 yarder they pay the most). Maybe I could have complementary lemonade and other perks like that. If they even ask me to shoot, they will be benefitting to the cause more than just oweing me if you know what I mean. I need ideas not jobs thanks!