I voted "Everyone paddles and portages together" because that's the goal.  But then what happens is we get a bit spread out and "We regroup at portages". 

I like the company of groups, but one great thing about our 2012 1-canoe trip was that no one was asking "where do we go" from 1/4 mile ahead over the radio.  The last couple trips before that I've been the organizer/navigator/leader, but I've ended up with a relatively slow canoe & navigating from behind sucks!  "If you want to be in the lead, you need to know where you're going!"  :P

-Tom