Erroneously believed to be in the public domain by a few video distributors in the 1980s, because of its alternate title, "Woody Plays Santa Claus".
During wartime, accommodation was at a premium since many large hotels had been given over to military operations for billeting troops in transit or on R&R. So Wally's requirement of reservations only was not unusual at the time.
Swiss chard is actually an edible leafy green vegetable. During WW2, it was grown in many victory gardens on the home front.
Sun Stroke is likely a play on the winter resort Sun Valley, Idaho, already a popular destination since the 1930's.
Woody's singing and fast paced antics are done a style similar to that of popular comic entertainer Danny Kaye.