Well... the course is pretty wet and playing a round of DG may want to wait a few days but the proshop is open and has pretty much anything a disc golf addict could want. If new discs, bag, towels, shirts etc... aren't enough there's always the trusty gift certificate. Morley Field proshop is open 365 days a year! If that doesn't cover it here are a few other inexpensive ideas that a disc golf geek may be interested in.
and of course if your disc golfer owns a PS3 then this is a must have... Sports Champions - PS3
(bold = highly recommended)