At the top end of the parking lot, to your right, as you stand on the museum porch, you will see a building with red tile roof, this is The Presidio Bowling Alley. The bowling alley has a nice, and affordible snack bar, with burgers and curley fries! Also, as you stand on the museum porch, look to the left, towards the fire department tower. Next to the fire department, La Terrasse, has very nice food, relatively casual and great views of San Francisco Bay. La Terrasse is a bit expensive.
I knew about La Terrasse (which I think I got the street wrong, I believe it's Lincoln right there as you are coming up the the barracks on Montgomery), but I did not know about the Bowling Alley. I'll have to check that out the next time I'm up there.
Well, we ended up staying at the Hilton over by the Airport. It was in South San fransisco so the price was great and it was pretty nice. It was only a 25 min drive in the morning to get to the Museum. For lunch we went to Fentons in Oakland, just after stopping by PIXAR for some photos. What a great trip we had! The Walt Disney Family Museum was amazing!!!