We drive to Austria 4 times a year from Wirral.
For years we’d leave around 10am, drive down to Dover to get a 4pm ferry, get to Luxembourg around 11.30pm. Cheap hotel then set off after breakfast and get to Austria late afternoon.
Last couple of years we’ve gone Hull/Rotterdam,
We can leave Wirral at 5pm, the ferry sails at 9pm, a bite to eat and bed. Then we do the 630 miles in one go the next day, usually takes 12 hours taking it really easy with a few stops.
Although the Hull ferry is a lot more expensive, the route is around 230 miles shorter each way and saves 2 hotels, so a similar cost overall but much more pleasant.