It's a lovely spot just past Jurien. Toilets, no showers but basically on the beach front. You have to pay your fees at the Shire offies in Jurien ... I can't remember if you can do it online tho'. A 2wd can access it easily ... it's likely to be full this time of year tho'.
I've found Cervantes to be much quieter around that time ... you could easily find a spot at the caravan park there and it wouldn't be crowded. So, hazarding a guess, I'd say that Sandy Cape should be ok
From memory you can't book a site at Sandy Cape. If you go and the place is full, just go back down the road 25k's to Cervantes and stake a claim at the caravan park. There's some good stuff around that area and if you have a 4wd you can go to Grey for a morning or afternoon trip.
I always preferred Cervantes to Jurien as it is much less 'yuppy' ... but that's just my own preference.
Sandy Cape is one of our favourite spots to camp...but you have to pick your times. We were up there at the start of December - caravans and RV had most of the good shady spots...luckily we have a big fold out gazebo otherwise would have fried. Some of the sites are pretty open.
Tends to be pretty windy a lot of the time...think it drops off around now. Camp ground sits behind the dunes then a short walk to a great protected bay. Good for swimming fishing etc. Also see dolphins, seals, stingrays etc cruising around.
Can't book sites unfortunately - probably chockers during school holidays. We made the mistake of going up a few easters ago. Managed to fit in but the toilet block was enough to make your eyes water!
There is a caretaker on site - he sometimes collects camping fees, otherwise you pay at the honour box at the entry.
Probably as close as you can get to beachcamping I think.
Hope this helps... can email you some pics if you like (not sure how to post them here yet)