Can't comment on Towersey as I only went once and didn't like it but at Gatlres Music and Beer Festival in Yorkshire you have to buy a book of 10 tokens for £17.50 for drink, food and the festival bus. This means that food stands can end up charging more than they normally would as they round up their prices rather than down and you can end up with spare tokens that are worthless after the event. It will also mean that the price of a pint is £3.50 this year. One of the reasons is that the festival takes a cut of what's spent. OK, I know it's for charity but it's inconvenient to have to queue up for a book of tickets and very expensive when you only want one pint because you're driving.