Will it cost more if i have a bigger tent?
In our experience, having a large tent ourselves, the vast majority of campsites do not charge extra for larger tents.
Many may well charge extra for additional pup tents, gazebos, vehicles, trailers etc.
But generally most pitches are of a size to suit any sized normal camping tent. Marquees might be pushing it.
For peace of mind it may well be worth enquiring with the campsite you are interested in.
Each campsite and caravan park advertised on the directory has their own unique contact form, below their descriptive text. Enquiries are sent direct to the individual campsite and they can respond by email or phone as you prefer.