Bethann,
The last time I stayed at Idle (2019) they had a few inflatable things on the side of the small restroom, towards the beach area, for kids to use. We left our floats too. who wants to pack a wet sandy floaty that you get your $10 out of anyway. I would hope this is typical of most travelers, so expect to find something. I did not see a pail & shovel though. An inflatable beachball or floatie can fit in your pocket.