Helen,
During the "high" season the camp site operates a free of charge boat service down the river argens, which is at the back of the site, to the beach & back again runs about every 20 mins.
You can cycle down the road that the site is on (its a quiet road not a lot of traffic uses it except for a couple of vineyards and the other camp sites situated on it) but the road at the bottom that runs alongside the beach is the main coast road.
The site is equidistant between Frejus and St Aygulf, and both are not really within walking distance, although you could if you really wanted to!
Not a lot goes on in St Aygulf at night, but it does have some superb restuarants! We (wife Janet & I) usually drive down to Port Frejus, park & then walk along Frejus sea front up to St Raphael & back (about 4 miles total)filled end to end with cafes, bistro's & bars etc, & if you overdo the liquid refreshment, take a taxi back to the site (20e ish) & rescue the car the next day.
Market along Frejus sea front on Sundays & market in St Aygulf on Tuesdays.
If you check out the site on Eurocamp (www.eroucamp.co.uk) the photos shown are an accurate representation of the site, but unless you have children & want to "loose" them for the day in the kids club, book independantly, however the reps are all friendly and are a mine of information & always willing to help.
If you want any more info we could excahange email addresses.
BTW, where are you in the UK?, we're in West Sussex.
GeorgeB