Good Luck on your travels. We did the journey last Friday with out any hitch. If you want a treat for lunch go into Service Area at Im Hegau and ask for Karotte-Ingwercreme suppen. Carrot and Ginger Soup which we had on Friday with a roll for lunch it was delicious like all German or Austrian Service Areas the food and surrondings are excellent and food is too. Another one to try after the Alberg Tunnel before Innsbruck is the Trofana Tyrol in Austria more excellent unusual surrondings and good food. No problems with parking or safety on these areas. Stolen Caravans are unheard of in Germany and Austria. At Im Hegau there are special parking for Cars and Trailers/Caravans. Just follow the Car with Trailer sign.