When your in cape may, bring bikes if u can, easiest way around town as parking is tight. Sunset beach has beautiful flag ceremony at sunset, and you can see the remains of an old concrete warship sticking out of the water. I've never taken my trailer there but I'm down there a lot each summer as my mom has a house there, so no personal knowledge of pros and cons of each place, but consider them just a place to stay while seeing the sights.
Lighthouse is also fun to go to top of.
Lobster house restaurant gets two thumbs up