I have been doing photography consistently for over a year now and only within the past few months have decided to start charging for my work. My main area that I work with is live music events. Typically doing shows that area only around 4 hours and usually will charge $50 which I'm not sure I may be underselling myself but then again don't want to spook any clients because my traffic isn't that frequent. Now I was asked to cover a festival by someone who is performing that is not that large but the festival has a few larger headliners that have been heard on the radio and will have my travel covered. How should I gauge to propose to being paid for this?