It's a doddle Joe,
Jump on the ferry early evening in Hull. Chill out, eat, sleep (or drink, go to the onboard clubs, casino etc) and wake up fresh (or ruined) in Rotterdam first thing in the morning....shaves 130 miles of the UK side for me and it's 120km closer to the Ring on the other, no having to drive around the M25 or through France either!
I've done tunnel and ferry before as the costs didn't stack up - that was before I realised you could group book, it aint cheap on your own (circa £250 return).
This will be my first time on the party ferry, but the others who've been this way all agree it's better and much less exhausting. The return drive is a killer via Calais/Dover when you just want to be home.