What do you do if it's the dead of winter? Like January in Minnesota?
In that case trench latrines would be miserable...
I would opt for the bucket composting method as described in “Humanure”. I used that method and it works admirably. The bucket toilet can be set up inside the house and then the buckets dumped outside in a compost bin/arrangement. Stuff of all kinds composts even in cold climates, just takes longer. If the crap is covered after each “deposit” in the bucket, and then when the bucket is dumped on the compost pile another shovel of composting material is put on it to cover it, it will have no odor at all.
I like the raw sawdust the best but chippershredded stuff works very well too. Even dirt.
Here’s a link to the Humanure site, somewhere on here you can download the book, and I see there are videos. I just bought the book many years ago.