One other point. Tell her that you understand she is feeling jealous over you going on this trip and that she might have concerns that you could have fun with your friends that could run into some stray female looking to pick you up. DON’T ask her if she is jealous. She is, but she won’t admit it. Just tell her that you are glad to see this side of her because it tells you that she really does care, but she has nothing to worry about. THAT is being honest and that is something I think she will hear.
I don't think Mrs. HD is jealous. I think she doesn't want HD to have any fun with her or without her.
I had a bf like this once. One day I played hooky from work and went to the beach. I didn't call anyone (except to "call in sick" to work, and just took off.) When I got home that evening (no cell phones in those days) instead of being glad I had fun, he was mopey and pissy because I had fun without him.