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. 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 (buried or packed out) from their land. In most locations, burying human feces in the correct manner is the most effective method to meet these criteria. Solid human waste must be packed out from some places, such as narrow river canyons. The Host or land management agencies can advise you of specific rules for the area you plan to visit.