But consider that you now have a 5lb raft in your kit. I used to go with an optimally loaded 40 pound pack for 7 days in the wild. A 45 pound pack would be ideal too. When I get to a river, I am not trying to find the wickedest class 5 rapid to rush over, I would rather get across it without getting wet, without getting my boots too wet, and without turning into grizzly bear fodder.
In reading through the way those rafts are constructed, they are the best you can get for lightweight water transport.
Up here in the high Unitas, where I play in the summertime, a typical hike will see you go past twelve pristine lakes, some teaming with beautiful fighting grayling, and I have often seen people lug up 25 pound floaters to get out to where the action is.
These people were featured in an AP network news story, for no other reason than they presented a quaint business starting up in an out-of-the way place, and I'm always on the lookout for a good toy or two.
I can see the people watching from Grannie's canal banks as someone takes a 5 pound raft, adds a little electric jet ski motor, and scoots around in the wakeless zone...