As noted above ...
At least 24 hours ....
A) Keep perishibles on ice in a cooler until 24 hours after arrival
B) Use an additional fan
C) A bag of ice or frozen water bottles in the fridge/freezer is an huge help.
We usuallly count on eating out the first night we arrive in order to alllow the fridge time too cool down to safe temps & migrate the perishables from cooler to fridge/freezer the next morning.
I'd also recommend buying a cheap thermometer ($3.00 from ACE) and putting it inside yr fridge. "it feels cold enough" is probably a bad way to avoid food poisoning yourself on a camping trip