Thanks for the info on the size, I had no idea.
The open day information is on their website.
http://hampshiretortoisesociety.org/index.html
The Hampshire Tortoise Society Head Quarters is Tortark and can be found opposite Garsons Garden Centre, Fontly Road, Titchfield, Fareham, Hampshire, PO15 6QX.
I haven't been to their open day before, but thought I would go and support. I did go to the HQ when I was in the area a few months ago but it was closed. However, at the huge garden centre opposite met 2 people working there who have lots of torts between them.
CB has been and I'm sure she said they had donkey rides one year!