Thursday is a celebration day in Germany, most don't haven to work/Studie etc. on friday as well.
So there are 4 days off!
In my opinion that's perfect time for a short trip!
Thought about going to the german sea (Rostock, Stralsund...) or Poland (Szczeczin, Poznan...) or sth. else you suggest.
Are YOU in?!
I've been to all of the the named towns. They are worth to see.
But any other Suggestion of you would be fine as well!
Also about the way how to travel/stay i have some ideas but I'm open for anything.