Planning this summers company picnic, about 60 ppl. Looking for ideas to make it the best yet?

Last year we had the usual cook-out (hamburgers, hot dogs, salads and desserts). We played corn toss, ping pong, and had game tables. When evening came we watched an outdoor movie. Everyone had a great time but I think we could have done better. Of course there was music too. Any suggestions?
Update: It was hosted at my home. We have a small office group and I am including family in the final count. Due to the economy we have to be sensible with finances.
Update 2: I have an acre lot on a river.
Update 3: Looking more for entertainment ideas than food.
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