Putting on an outdoor art festival is an event in and of itself. There are a lot of people that want to put on this kind of event. To make it happen, make sure you have the resources you need to keep everyone comfortable. Make sure to contact amenity providers in your specific geographic location. For example, connecting with a porta potty rental in Lynchburg, VA company is smarter than making a general, non-specific search. This is essential because you need to offer restroom facilities to everyone that attends.
Ultimately, it should be your goal to make sure that you have not only facilities to help people use the restroom at your event, but you should also make sure the art show is set up how you want it to be. This means creating booths for people to show off their work. On top of that, you need to ensure that you have signage laid out in a way to create a clear path to move from one exhibit to the next. This is the only way that you can be certain that you are taking care of people and their needs when they come to your show.
Prepare ahead of time so you have all of the resources you require to take care of the guests that come to your art show.