This recycles underscore first used in Loopy DeLoop theatricals and most other H-B cartoons made before 1966 (the scene where the mother bear chases the trailer with her cub in it).
The head ranger speaks in a manner (courtesy of Frank Welker) which
imitates the late Don Adams of Get Smart (NBC/CBS, 1965-70) fame.
Bruinhilda was originally named Snaggle-Tooth.
"Grim And Bear It" coincidentally aired on the 56th birthday of Jean VanderPyl, who voiced George's wife in the episode.
The name of the wife (Jean VanderPyl) is never fully established; she's only referred to continuously in the form of the term "dear" by her hubby George (John Stephenson).
Number of times George intones "Yeeees, deeear...": 13.
The only things George says other than "Yeeees, deeear..." are "A small piece, dear," and "I said, 'a small piece,' dear".
The one-liner, "I mean, mean! See what I mean?", is repeated in Episode #80-21, "Termites Plus Two."