You know the nice thing about traveling solo, you can go on your own pace.  I will admit that at 51, I was still ripping around trying to cover ground.  I don't know if its age or just taking time to enjoy my surroundings more, but when I'm alone whether I double, triple, or leap-frog portage doesn't raise much of a blip on my radar.

Perhaps I don't travel that slowly, however.  When traveling with Jimbo's crew a couple of years ago, on our next to last travel day, I chose to lag behind at the campsite and leave about 30 minutes behind the others.  That way, I got to travel at my own pace and not have to sit and wait for portages to clear of traffic before I could pull-up and unload.  (I was also getting a bit concerned that others might have felt I was slowing them down.  While having others haul part of your load over a portage, it really wasn't necessary.)  When I arrived at the final campsite (I had the misfortune of paddling in driving rain for about the last 1/2 of it, which did slow me up just a tab in the interest of caution), I asked how long they had been there.  "Oh, about 30 minutes" was the answer I got.  So, maybe I wasn't so slow after all.

dd