Craigyoung wrote:
I haven't but the thought off stopping in a tent !!

Bout a 3 hour drive from Calais through France pending on how far into Belgium it is . I'd rather take the van . But this all depends on where you live also to get down to Dover ?
Better start getting your International Driving Licence,Euro’s, non EH1C travel insurance, and reserve your spot on the M20 too. Only jesting as some fail to realise that we did go to Europe pre joining the EU, and going to Switzerland in the mid 1960s the only border we were not waved through was on entry to Switzerland.
Hope you can get a pitch at Spa. Even a tent would be okay as with enough Belgian Trappist beer you will sleep well anywhere.