We are flying into Munich from the US as a gateway to Croatia. I'm guilty of always trying to do too much and want to avoid it this time. We met a woman rom Slovenia last year at a wine tasting in Sicily who gave me a lot of "must do" places but the logistics seem very complicated so I need to narrow down so we will have time to just relax and enjoy our trip. We are a very active couple in our early 70's that love hiking, wine, and outdoor activities. We want to visit Dubrovnik, Sibenik, Trogir, Istra for winery visits, and Lake Bled. We absolutely want to get to Mostar, perhaps just for a day trip? Would love to spend some time in Ljubljana as well. Plitvice Lakes Park is also appealing. I can fly directly to Dubrovnik as soon as I get to Munich and thought it best to start there. The most convenient return flight to Munich is from Zagreb so a couple days there would be ideal.
I'm not sure how to structure this itinerary and what is the best way to cover that much ground - i.e., when and where to get a rental car, where to use public transit, where to just settle in and enjoy the scenery. I've had vacations where I was moving out of our accommodations every two days and driving somewhere and those are not always my favorite. I would certainly appreciate any advice. Thanks in advance!