Full Hookup Issues

The black tank valve stays closed until you need to dump so most of the stuff in the black tank will pressure and gravity flow into the sewer connection then walk the remainder to empty the sewer hose. Grey tank will also flow as it builds up pressure in the hose and then you can wlk the hose to get rid of the rest. You'll be surprised at how little is left that has to be walked.

Flipping the axles will solve other problems as well. Helps to eliminate tail dragging in dips, reduces the vacuum caused by semi's going by and will make it easier to traverse rough dirt roads.