to SES fella
It will take approx 5 hours to get there once off the boat/tunnel, including a stop for fuel and not running into any Brussels troubles! We organise an annual group trip to the ring once or twice a year sometimes.
There is a section in the forum dedicated to the Ring with lots of handy travel tips and guides to the ring itself, well worth a quick read/watch
If you have not been before you will have a blast, go very steady if its wet!