Last time we asked in May, there was officially no pool hopping at DLR, even for DVC members. However, when we went to check out the DLH pool on our last visit, the attendant didn't really stop us from walking right in and looking around. Of course, we weren't there to swim, we were just looking, but I wonder if he would have said something even if we had suits on....
And for the record, andersonsc is right that there is some pool hopping allowed for DVC members at WDW, though not for some properties.