Well with one flight to KRK each day and your short holiday (& for your husband's piece of mind) better safe then sorry and add another 20-35 min to your connection time.
On the other hand..spending a day in AMS
If you have some spare time left in Krakow i would recommend a visit at the Auschwitz concentration camp, it's only a 55 minutes drive west from Krakow, pretty impressive.