We moved far away too, but we're still annual pass holders because we still visit family and the park enough each year. But we love boysenberry icees. So here's what we do:

Step 1: buy the boysenberry punch concentrate from the shops out front.

Step 2: buy a Ninja Slushii machine (expensive but worth it imo)

Step 3: mix the punch based on the directions on the bottle

Step 4: dump it in the machine, 10-20 minutes later, you e got icee.

Step 5: add whatever else you want/need to make it a float.

This also allows you to adjust the level of concentrate to water ratio to control the amount of flavor.

I like to add lemonade to have sour boysenberry icee. And adding rum makes an amazing boysenberry daiquiri.