Where do you plan to bug out to? You do have a plan for that that is more detailed that "hop in the car and drive somewhere", right?

Unless you're bugging out to "the woods", a 3-4 days supply of food seems like a bit much. Especially since food is low priority and the most likely scenario is driving a few hundred miles inland to stay at a hotel for a few nights...

I'd pack a couple meals and use the rest of the space for water, warm clothes, important documents, etc.

But what do I know...I live in the high desert where the biggest threats are drought and cold exposure.