I suspect that having just 3 days home preps would leave you between a rock and a real hard place by the fourth day.

I believe that most agencies are now saying two weeks is better, and a month is better than that.

Bugging out with a reasonable, set destination in your plan, 3-5 days should be the minimum for a pack, I would say more for a car kit.

IOW, the more, the better.

Sue