My dad was walking on Windansea beach a few months back (maybe August) and actually saw Mitt on the beach, talking to someone who appeared to be some sort of contractor. I also have friends who have spotted him at other locations, so I think he may be here a fair amount.
Also, two of Romney sons and several grandkids live in 4S Ranch (Ivy Gate, to be specific). Several of his grandchildren attend Stone Ranch Elementary. Mitt was spotted walking in and dropping off some of the grandkids at school last February. (It may have been the day when their mom had a baby, or soon thereafter).