Neil,
It doesn't take that long to register a vehicle. Find your local office and take EVERYTHING down there, proof of age, insurance certs etc. Wait in the (long) line and fill out the form while there. You will need dimensions etc. You should be able to hand over the cash, and the docs, and go back the next day and collect the form which enables you to buy some plates. I've done this 4 or 5 times. They have only asked to inspect the Wolf, which is arranged for next week, if you are lucky they'll even give you a tax disc while you wait.
Chris