I would go to Tannersville. There, you’ll have minyan and food, and Hunter Mountain has tons of stuff to do, for all levels of interest and fitness. If I rember corretcly, you can even take a cable car to the top to the mountain, and bike downhill.
There is also tubing down the Esophus, out of Phonecia, NY (the place is called Town Tinker).
This can all be done for around $300 (assuming you’re sharing a room with a few friends)