"Use less water" and "dump more frequently" seem like glib responses, but I agree with them.
The biggest change you can make is using less water when you do dishes. It took me a while to learn this in our first RV, but it was a next-level lesson for me. Turn your faucet on to a trickle to do your dishes. If this doesn't work for you, get a dishpan and use it for the dishes and then dump the dishpan outside someplace.
Also start by wiping the plates with a paper towel into the trash to get most of the grime off the plates. Or better yet, do like Wilma Flintstone did and use a dinosaur (or your family dog) as your garbage disposal to get the chunks off the plate before you head to the sink. This will also eliminate most of the food waste going into your gray tank, which will keep the smell down.
And if all else fails, go with the tote.
