Old-Biscuit wasn't specifically asking you about your medication, it's just his way of being humorous in his signature line and shows up in every post he makes on this forum.
Good luck closing off the lines and don't give up. Check all drawers, cabinets and compartments to see if you can find those caps somewhere. They were prob put somewhere where the person who winterized thought it would be an "easy place to remember". Hopefully it wasn't in his garage
One of the joys of RV ownership is learning how everything in your rig works/operates and eventually laughing when you look back at all the struggles you had and the RV pro you have become.