Squash is awesome fun and at tangalooma it's one of the better free activities you can do away from the heat (and wind if there is any).

When you're just beginning at squash it's a lot easier than tennis and there's a lot less following balls or picking them up from the corners as the wall direct them back to you.

The squash courts at Moreton Island are near the flensing deck, the standard $20 deposit for free activities applies and you can book and pick up your gear @ the Water Sports hut.