When planning an outdoor gathering at a scenic destination, what facilities do you think make the biggest difference to the overall visitor experience?

Places that host festivals, group tours, weddings, or outdoor activities may not always have convenient permanent facilities nearby. In those situations, organizers sometimes consider options such as Luxury Portable Restrooms to provide visitors with a more comfortable experience.

I'm curious how people approach this when organizing events at parks, countryside destinations, or other places away from regular amenities. What practical things should organizers consider, such as accessibility, cleanliness, location, and the number of visitors expected?