Convoy in the Park -2017

A family of four with young kids aren’t going to sit and listen to a cover band for four hours though. With all the costs, is there a need for all the bolt-on entertainment though?
When I’ve been to shows I must’ve skipped 3/4 of the “entertainment” and much of the non transport related “attractions” so this is probably why I feel the prices are high.
I still think that charging truck owners is wrong, charge the tat merchants by all means.