try Stuttgart and Bavaria its lovely and healthier than the beaches check it out on internet, you can even drive there spend a night in Holland one in Frankfurt and go where you want
Went on a school trip to Germany by coach from South of England back in the day and that took soo long
I’ve driven to south of Spain before and that was a nice drive but it’s tiring driving so long everyday
drive to hull and take the DFDS SEAWAYS FERRY, sleep on board have breakfast then drive to Amsterdam 35 mins sight see then Maastricht 2 hours away eat, Frankfurt 1.45 hour then Stuttgart 2.5 hours stop where you want motels around 35 euros a night