arknoah

You do have to open the valve at the base of the toilet before going to the dumping station, and it will stay open the entire time you drive home.  You might want to stop along the way to close it, if that makes you feel better.  The only times I have had to use the dumping station, I haven't worried about it.

If you want to clean out the toilet between trips, perhaps using one of the blue sewer totes at home after running some water or water with chemical through it is the way to go.