Decent binoculars are pretty heavy and every ounce adds up. Too much weight is the one thing sure to ruin a trip. They would have been nice at times when I was in Yellowstone or similar places, but if I took everything that would be nice at times, I hate to think what all I might have carried.
If the primary or at least a very major purpose of the trip was bird/wildlife watching, maybe otherwise no. At least that is my opinion.