opinions please

I am wondering if any of our readers can help us.
As you know, we are holding a garden open day on Sunday May 17th. This will be an opportunity for the public and local communities to visit this award winning garden and see how we have been using it and to also see our willow classroom. We had decided to charge an entrance fee of £1.50. I have started though to receive some feedback from school parents saying that they felt this entrance charge would keep people away. As gardeners I would be very interested to hear your opinions on this matter. Our team is meeting again on Monday where we will discuss this issue for the final time so I would be ever so grateful for any opinions you can share with us.

The aim of the day is to bring people in, the more, the merrier, for them to have a fun afternoon and to raise awareness about the value of gardening in schools.
We will have a local potter, stone mason and wood turner demonstrating their craft on the day, we will be selling locally sourced cream teas, selling plants, May Pole dancing, country dancing, guess the weight of the cake, make paper pots and plant seeds and much much more.

So please, if you read this post, do leave a comment about what you think would be best.
Thank you, thank you.