Kirkwood Marina offers one seasonal convenience store located on the lake side of Highway 287.  Gas is available via credit card or cash when the store is open.
The Marina Boathouse Store is open seasonally. Beverages, ice, snacks, bait, fishing tackle, and camping and water recreation supplies are available there, where you also pay boat launch, slip, and dry dock fees and check in for watercraft rentals. All fishing licenses are now from online.