If you want a larger capacity for urine collection you can plumb the urine diverter to a larger container, even a small tank if you want.
Just make the tank installation
reasonably easy to move and no larger that you want to carry.
The gallon container is good for 2 or 3 days depending on use, for two people. One of the things about the C-Head that I like is the urine container is a plain old gallon jug, the same as milk comes in. You can have a coupla back ups so that when one is full you can cap it and remove it and queue up another one easily. They just lift
in and out with the lid raised. Empty them however you prefer. When a jug gets yucky from the calcium build up, which it will, you don't have to clean it. Just rinse and recycle or toss in the garbage, depending on how trash is handled.
The C-Head is designed to be emptied more regularly of solid waste.
You can have a second container (another 5 gallon bucket) which you put a special lid on that is provided with your head when it arrives. It has air access to keep it aerobic and a filter to keep bugs out. You can allow it to compost further, and fill it up to however much you can carry easily.
Or you can empty into a sturdy garbage bag and drop in the dumpster, in the same way you would empty a diaper pail of disposable diapers. The better news here is if you use compostable bags for the garbage dumps you will not be putting uncompostable plastics into the land fill. Even if you use a plastic bag, one plastic bag is much less non bio material than diapers would be. If you use compostable bags you can NOT store them for any length of time. After all, they compost...
I would way rather carry a bag of dried out waste up to the dumpster than deal with pumpout...