When I am walking a longer distance, like 7-10 miles per day with a backpack, I carry my 3.5-pound tripod inside the pack. I don't get it out much along the trail. I use it extensively once I reach my destination. If I am going a very long distance, like 20 miles per day with a backpack, then I don't carry any tripod at all.
However, when I am going a shorter distance, like 5 miles, then often I carry the tripod loose in my left hand. That allows for much quicker deployment for the event of sudden wildlife photography.
If quick deployment is important in a tripod, then consider one with flip-levers. I've seen other types that take a few minutes to erect. By then, my shot would be long gone.
---Bob Gross---