Geoff,
A few years ago - and nothing has stuck in my mind, other than the woman owner (I think) spoke English and was helpful - but that's pretty normal in Benelux.
The centre of Gent is a great place to visit, don't be put off by the motorway network to the South and East of the city - the main Zeebrugge (and Brugge / Bruges) to Brussels, and Antwerpen to Kortrijk (and then Lille) motorways cross a few km to the south east of the city.
I'd certainly recommend visiting Brugge (learn to say Brugge rather than Bruges if you want to impress the natives) - park at the main car park south of the town and walk in.
I'll try to look up the Roosendael camp site in the Dutch ANWB guide.
Robert