Park and stay actually does seem like a decent deal, but due to my work hours and the times I usually depart and arrive I would get little if no use from the hotel room. I work in the evening, so I usually end up going straight from work to the airport (via the gym for some exercise and a shower) for a 6-7am flight out. I'd get something like 4 hours in the room otherwise that I don't really need. Even after subtracting a modest value for the room this would still cost me around $8/day to park after the service fee and 11.5% hotel tax on the entire amount of hotel+parking is factored in.

I think I'll have to call a few of the lower end motels near the airport and see if they have any cash parking only deals to just stay in their lots.