Got a little trip in the planning stage - taking 3 / 4 days to get to Prague for Harley Davidson's 115th Birthday bash. Could be 10 / 14 of us - have got rough route of Swansea / Dunkirk / Eindhoven / Kassel / Leipzig / Prague roughly planned so am looking for some decent overnight hotels ( parking ? ) and places of interest to call in on the way. Have got Colditz Castle and the Mohne Dam pencilled in already so what am I missing ? Likewise any tips from more recent travellers that have been in this direction.

Cheers in advance