I have shot quite a few models in Chatham who have come from Essex, Surrey, London, Surrey as well as Kent.
You may get more interest from photographers and models if the location of the shoots was nearer Maidstone.
The problem with so many photographers and only one model is that you had a very small time shooting.
The lighting was organised by whoever turned up, so you cold get a bit of hands on with the setup.
I think these "Group Shoots" with lots of photographers are good for inexperienced photographers on a budget, but they don't represent good value for money for experienced photographers with their own lights.