Look into getting a maceration pump which allows you to use a garden hose to run the waste to the septic tank, toilet or dump station.
RV repair shops, gas stations/truck stops with propane, RV parks if equipped with a dump station will let you dump for a fee. Most roadside rests along the highways will have dump stations.
Make sure your guests or any kids learn the proper way to use an RV toilet. No need to fill the bowl before doing your duty.
Navy showers to save gray tank space.
Some RVers keep a small trashcan next to the toilet and put their toilet paper in there instead of flushing it. This helps to extend the time between dumps.