You can buy a 'blue boy' waste tote with wheels and a handle, that could be tethered to the rack on a bicycle, or if you use a smallish tote, 15 gallons or less, you could probably use that with a good quality bicycle cargo trailer. When I was at Quartzite, I made a few water and trash runs with my ebike and trailer.
BTW...if you have an ebike (or any bicycle) and your RV is more than walking distance from one of those vault toilets out there, you can make the trip to the vault toilet when it's 'time' for a nature call, and that way your own waste tank in your RV wont fill up as fast.
Just sayin.