The best portable waste tanks are free. Check Craig's list or your landfill/transfer station. I got mine for free, don't remember the brand, but it was fairly new, no cracks, damage, duct tape or repairs.
After filling it the first time and trying to haul it from a site to the dump station with my truck and almost having a huge code brown, I pulled it the rest of the way by hand. I emptied it rinsed it and put a sign on it "FREE" and left it at the dump station. It was gone within an hour.
I decided I would rather break camp and drag the camper to the dump station than ever deal with it again. After then, if we didn't have full hookups, we used campground facilities as much as possible, used the toilet only at night and in an emergency. Granted it was just my wife and myself.
Didn't work well for me, not saying it won't for you.
2016 Cruiser 315RL
2012 Ford F350 King Ranch diesel SRD