I kinda like the idea of carrying the empty tote in the back of the truck bed and then use the 12VDC Macerator Pump to fill the empty tote in the back of the truck bed. When full then just disconnect the hose from the macerator pump and tie off high on the truck and drive to the dump area.
Then drop the hose and let gravity feed empty your portable tote.
The only downside would be not having a bigger tote than you tank capacity so that you don't have to worry about over filling the tote in the back of your truck bed and making a mess...
I haven't done this yet have watched a couple of neighbor campers do it. Seems to be mess free for them...
My daily chore camping off the non-hook up sites is carrying my two 7.5 gal Aqua-tainer gray water totes to their bath house using a folding two wheeled dolly to pour down their toilet and bringing back fresh water in my 5 gal water can. My 5-gal cassette potti tote also has wheels on it...
Roy Ken