Jock
If it is any help, we are Salvation Army officers stationed in Hull. We live 15 minutes from the terminal and five minutes walk from the city centre. We have a large private car park between our house and church - you'd be more than welcome to park up for a few hours - just depends on what day and date you are travelling. Feel free to e-mail us. The city centre has good restaurants etc if you wanted to walk in and get a meal before sailing, or just enjoy a walk around after your long journey south.
Our e-mail is greetham@greetham.karoo.co.uk