after researching the manufacturer of the bars and some other similar products it is safe to say that one mickey ice cream bar is 8 points. Hope this helps...
Sometimes, I think that even though you have good intentions of counting your points while in Disney it may be better to try to increase fruits, veggies, and water for your sides. Eat what you want and do dessert a few times at least on vacation. Come back from vacation, then regroup. You will be more upset and have more cravings if you deprive yourself from the snacks you want. I say go for it, forget counting, enjoy your trip, and start over when you are back home.