First, tape record the sound of a bear tearing through garbage. Put that tape on a player under the hood. Hit the remote, fill the 190 with growls, snarls and the sound of tearing cloth. Have everyone go outside to investigate.
That will leave you with some privacy for a little while.
Or, travel with doctors, people who know that the human body has many needs, some of which come along at night. Or strangers, people you don't care about. Or friends, who would understand.
Another thought is a shovel with a poncho.
Seriously, that was a problem for me which was overcome only after a great deal of agony, praying for morning, trying to tip-toe and so on. I finally decided that it was my guest's problem, not mine, and if it bothered them I would be as sorry as they wanted me to be.
Good luck. Some things simply have to be worked through, unfortunately.