Husband wants me and the kids to go spend Christmas with my family without him this year

We always fly out to my parents house and stay there every Christmas but this year my husband is wanting to stay behind while me and the kids go. He's been feeling low for months because he was laid off a job he loved. He was a recovery support specialist so his job was to work with someone in recovery from drugs or mental health and work with their therapist and caseworker and give them support. My husband is a recovering addict and also has complex PTSD. He adored his job and him getting laid off really destroyed him. He did eventually find another job at Amazon fulfillment center and he's been miserable and hates his life. He kind of had to take it because we needed the money. So he's just been depressed and trying to find another job that fulfills him. Why he doesn't want to go to my family's for Christmas is because my husband wet the bed for a long time because as a kid and teen because of what he was going through. He eventually stopped but when he gets stressed he starts back up and he's been wetting our bed for months. So he's embarrassed and depressed and doesn't want to go over my parents house because he's embarrassed and depressed. It just doesn't feel right to leave without my husband and him he alone for Christmas. Especially when he's been so depressed and emotionally unwell. We would only be gone a few days but that still would feel wrong. Any advice?