No WiFi but ATT and Verizon both get great service. The park is in primitive mode after Labor Day. So you aren't able to reserve the pavilion and the bathrooms and water won't be available.
No Wi-Fi, but you can use the pavilion. For 10 people I wouldn't paying to reserve it. Have a great time there, it's my favorite place to be!
I would reserve a pavilion just to be on the safe side. Not sure about the wifi.
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