No personal experience going for more than a few days at a time in a wall tent.
However, to the OP or anyone else - check out a book titled “The Indian Creek Chronicles”, by Pete Fromm.
It’s a excellent book about the seven months the author spent living alone with only his dog through a winter in Idaho.
Per your recommendation I just ordered this book. I’ve been trying to find a book to read for an upcoming vacation and this sounds great. Thanks.