At the top here, you can see the original logo (203x164px). Below are some colored versions intended for use on event flyers and maps, including an unused 50th anniversary variant.
More color variants, these solid. The group preferred the gradient grain tone with solid crop-lines, but I rather like the more modern iconography here that lets the background come through.
The above are early mockups based on committee requests. Below is the version that was selected in the end.