Re: Taking lunch to the parks
As the OP said they think they will be using their AP a lot more often.
I suggest staying somewhere close and possibly with breakfast included. That will save some on your food budget. Or just carry in breakfast with you and eat it later in the morning. Then leave for dinner, maybe something you could microwave in the hotel room or $5 subs at subway.
Also if it fits the budget try the Homewood Suits it includes warm breakfast and dinner. Do the accounting to see if that would work.