So if I wanted to go to epcot after cape may....can I leave my car at the beach club and walk to epcot or the boardwalk?
No, not if you're staying elsewhere. As a non-guest of that resort, you will be given a 3 hour limit, as parking at the resorts are only for guests staying at that resort (with the exception, of course, being able to park at any resort for a meal or to check out a resort for a limited time).