Southport is an island that dangles into the Atlantic southwest of Boothbay Harbor on the Maine coast. There, Gray Homestead Oceanfront Camping sits on a rocky outcropping, right on the water. Swim at the private sandy beach, rent a kayak for exploring, or just hang around your campsite with a view (RV sites 17A, B, and C are the best; no tent sites are more than two minutes by foot from the water) and watch the windjammers sail by. There’s fishing on site, but you could also leave that to owners Stephen and Suzanne Gray; he catches fresh lobster (market price) daily for guests. The place is so nice, some guests choose to stick around all summer. Ask for seasonal-stay rates.