To save some valuable pennies whilst visiting Flamingo Land visit the Mini Market Convenience Store located near the Balloon Ride.
Here you can get drinks, sandwiches, hot food at a much better value than the food served in the theme park.
As you look at the Balloon ride (with the go karts behind you), you will see a building behind them and to the right approx 50 yards away. Walk to this building and you will see the mini market. You do not need to prove you are camping on the site to buy items here.