That's awesome commitment and thoughtfulness, I'm impressed.
I pee into a 20L (5gal) bucket that is half filled with sawdust. I cover the pee with more sawdust as I go. When it's 'full' (i.e. when the sawdust is approaching saturation, the bucket isn't actually full), I put a tight lid on and leave until I am ready to empty all the buckets (I have four). I empty into a humanure bin system. But, I think you could do this pee/sawdust system in your compost without the poo. You'd have to experiment to get the ratios right with other materials, there's probably a
thread on this already. There is no smell in my toilet room. If I leave the buckets with lids on to sit, there is a smell when I open them, but no smell in the compost so long as there is plenty of cover material (smell usually comes down to insufficient cover material with humanure, or too much liquid).
The advantage of that over what you are doing? More compost for
gardening, less smell. Possibly less work too, or the work distributed differently. Your system is less visible to others I think, which can be an advantage.
Plastic can hold onto smells. I scrub the empty buckets with
straw and a bit of water and then rinse and leave in the sun and air until I need them. There's probably a way you can do that so they're camouflaged. If smell was a problem I'd leave the bucket to soak with water and vinegar in it.
I've also used a 20L closed container with water in it to pee into (via a tube). But I find that more smelly and less easy to empty, and I don't have
enough places to empty that need that amount of urine.
The squatting issue I get. I prefer to pee outside, but am currently living somewhere where that's not usually possible. I'm on the lookout for a 10L (2.5gal) bucket that fits my clip on toilet seat, as there is more squat involved in that. Ultimately I need to design a squat stool for the toilet room.
Your experience with the closed bucket humanure is that it's not set up to compost (it's moldered instead, probably because there is no aeration, and possibly because you don't have enough
carbon materials). Google wheely bin humanure, there are perfectly adequate ways of producing compost in a smaller, close container than the Joe Jenkins humanure bins. If you are in a suburban situation I think being careful of the neighbours etc is a good idea.
Besides all that, the easiest way to deal with pee is to pee into a container, dilute it immediately, and then pour it into the garden immediately. No smell. Urine smells strongly when it's left to sit around. This is more work of
course, and it depends on how many times you pee in a day, how close you are to the garden, and whether you can do this discretely. If people ask, you could say you are emptying the bean soak water or such, to
feed the garden.