Winter Chill Out 2019

It was a thin green and black messenger bag, I didn't look closely at what's on it

Kevinj said:

Here is the pouch on Twisted Timbers...(courtesy of Reddit via random Google search). The pouches themselves are very secure.

Looks like a pretty fair solution. Saves the hassle of renting a locker for a short time. Since this solution is already being used the park knows how many of these things will fail.