After my original post, I never had a chance to read the replies given to it, I only did so after returning home.
I did include the 100-400mm Fuji lens in my backpack. The total weight was 13.6 pounds, which by far, weighted less than my previous bag which carried my Canon equipment.
As any "senior" photographer knows well, what starts weighting 13.6 pounds, feels like forty by the time you return at the end of the day to your place of stay.
My wife and I flew into Vancouver, BC where I used my 23mm and a 16mm wide angle lens for "street scenes", this type of photography makes one think differently and act with a certain sense of stealth. Sad to see how many young people live on the streets of Vancouver. We then proceeded to Victoria, BC where again I mostly used the above mentioned lenses, except the one time I used the 100-400mm to reach out and get a shot of a gargoyle perched high atop a building. We next moved onto Washington state where Olympic National park is located. Again I found myself using the smaller lenses except once when I saw a marmot in the distance and used this "big and heavy" lens with a monopod. The place we were at is called Hurricane Ridge (steady 40mph wind) so the resulting image was not as sharp as I would have liked. Seattle was next, here I only used the 32mm lens for "street scenes", this lens really is amazing.
So to wrap up, the 100-400mm got used twice. Yes, it does get heavier as the day progresses and probably next long trip it won't reside in my equipment bag.