by cantabrigian » Tue May 28, 2019 5:53 pm
You can see the entrance on Google Streetview (I'm apparently too "new" to post a link). There doesn't seem to be any kind of physical barrier restricting vehicle height, and I don't remember there being one when I was there a couple of years ago (but then I have a small car).
A point to bear in mind is that the car park can get very congested at busy times, and manoeuvring a campervan around it could be tricky.