If you really need internet while you are at Mohican, there is a Mc D's about 3 miles down the road that has free wifi, about another 1-2 miles past that is the Loudonville library. When you are pulling out of the park, make a left towards Loudonville.
Also take some inner tubes when you go there, the river runs right next to the campground and floating down the river in tubes is what most folks do there. You can put in by the bridge that goes to the cabins and float down and get out right at the pool, or float down a little further and get out before the bridge.