I always book my trailer tent as a tent but tell the site it is a trailer tent only one site refused my booking saying they didn't allow wheels on the grass but they allowed motorhomes and caravans on the grass I never quite worked that one out I think they wanted to be more upmarket!
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.