Once at the Stone Horse you can take Deep Hole road, across from the hotel, and follow to the end which is Red River Beach. There is usually some good action off the jetties on the incoming. If you want to recon the Rip Ryder you can check my website for directions from Chatham Center to the Refuge.
From the Stone Horse go East on 28 till the rotary at Chatham center and then follow the direction from the web to the refuge. If your looking for a place to grab something to eat after landing head west on 28 back towards Harwichport center (approx 1 mile) and look for the Hot Stove sports bar and pub. Good food and cocktails cheap. It will be on the left next to Cranberry liquor store, parking lot is located there also
That should keep you busy till everyone arrives.