Immigration is not an issue, coming from the Netherlands, but tnx for reminding anyway. And fueling in Germany for us Dutchies is Papenburg (EDWF) : friendly, by far cheapest, only a bit tricky landing when wind is south because of woods just before the beginning of RWY26
ANd tnx again for your good advices, will report how it worked out!
I would love to see a few pics and a short report of your experiences. I lived in Hamburg and was “based” in EDHS for the best years of my life and I miss it dearly! (In fact my avatar was taken during a low pass at EDDH after a flight from EDHS)