I should have posted this two days ago!
Anyway, despite your suggestions for costumes, here's what I did:
Keeping with the theme "The Shining" and its location -- a wintry mountain -- I wanted to be the Abominable Snowman. But Audrey's Costume Castle didn't have a suitable costume. Sure, they had Chewbacca bodies and ape bodies, but no suitable head. The Abominable Easter Bunny just wouldn't cut it.
Plan B: A mummy or zombie costume representing bandages; fake blood and other make-up to look like a) I'd fallen down the mountain; or 2) I'd been attacked by the Abominable Snowman. But both of Audrey's mummy costumes were already rented. At this point, I'm not terribly impressed with Audrey's.
Plan C: What Audrey's calls "Mountie Uniform", just because it's a red jacket with black pants. So I make a deal with Nice Clerk Lady: Find me a bellhop hat, and we're in business. After all, "The Shining" is set at the Overlook Hotel, and every swanky and/or spooky hotel needs a bellhop or concierge. So after about five minutes in the back room, bingo! -- Nice Clerk Lady finds the bellhop hat. So I take some black make-up, spread it around my mug, blend in some white to make it look deadish grey, use black only to get the salt out of my salt and pepper moustache, and scare the hell out of myself when I look in the mirror!
Actually, I did get several comments on the costume and make-up job at the party. I did not, however, win the prize for best costume. That was a well deserved landslide for a girl from work who dressed up as the Tin Man from Wizard of Oz. Last year, she was a flying purple people eater, but Randy and Mr. Lahey from Trailer Park Boys won the contest.
So thanks for your help. It was truly inspiring. If I ever get a photo of moi in said get-up, I'll post it here. I didn't have my camera with me, but several people did.