OK, was doing errands yesterday, and was in the Buena Park area, and thought of some more parking options, including the large Sa-Rang Church and La Palma and Brookhurst, and it isn't fullyused much of the week.
Then you have Buena Park Downtown and the mall, and there are usually lots of empty space, but you would have to avoid the Christmas season.
Then you have the former Movieland Wax Museum parking lot, and while work is about to start on the Butterfly Pavilion, you might be able to get some parking from them for awhile.
And then you do have Knott's, which has a lot of spaces, including the Western Dirt lots, but then during the summer when both the Theme Park and Soak City operate, you would have none. And then Knott's has entered into an agreement with the city in relocating the firs staion, moving form its current location on the south west corner of La Palma and Western, and moving it to the North East corner. The city wans the move so they can build a larger station with modern facilities and easier access for quick departures for emergencies. So Knott's will be losing some spaces during the construction time, but end up with about the same about of spaces, but more consolidated.
And you could maybe get CM's to use the Park and Ride lot where the 91 and 5 freeways meet. There are already bus bays built there (The current LA Metro Route 460 stops there).
So there are more options, and more than likely only for CM's and DtD employees, but still, a lot of operating costs in renting the spaces, and then running the shuttle services to get them to work from the farther lots.