Cassette Toilet vs Conventional RV Toilet

We built a Thetford C403 cassette toilet into our camper design. It looks a lot like a normal toilet and has the removable 6 gallon tank. I plan perhaps to get another tank and create a storage space under the flatbed truck for carrying it, giving us 12 gallons of boondocking storage. We don't intend to spend a lot of time at campgrounds...forests, deserts, gold claims are more my style.