Poohza,
I can identify with the drive thru problem, we end up going that route too. (And I only have one child, 2 yrs today!
) I am new to the Core program, but found that Flex really worked great with the drive thru. There are tons of things out there that are low pts and quite tasty and filling. With Core it just takes a little more thought- for example a chicken salad with ff dressing. Or a wrap and you just have to count the tortilla.
I think you will be able to make adaptations no problem. It just takes a little thought!