If it's only for four days, perhaps you can get access to your new home on your arrival. I know that when my cats arrived in Germany from the US, I was still living in a hotel.

I did have the keys to my flat and I just set the cats up there with a litter box and food and water. Went to visit them a couple of times each day until my air freight shipment arrived and I could set up myself in the flat with the cats.
Cheers,
Bev