When you are looking at different campsites on Hipcamp, you can see if they have a toilet available by looking in the Essentials section:
If it is specified that there is no toilet provided, this means the Host requires you to dispose of waste properly. We do not require Hosts to provide a toilet in order to list through Hipcamp if they offer dry camping for self contained motorhomes and caravans. In all other circumstances hosts must provide a toilet. We believe this opens up access to more backcountry sites and can be managed by providing education to both Hosts and Hipcampers on properly disposing of waste.
If a Host does not provide a toilet, we ask them to provide their preference for waste disposal from their land and any specific rules for the area you plan to visit.