A friend and I are planning a four day canoe trip this summer. We'll each have our own canoe, and most of the trip will consist of lake travel with a small number of creeks and short portages thrown in. I own a 13 foot aluminum canoe which I have used mostly for day trips and fishing. It is my understanding that longer canoes are more efficient, so I'm considering borrowing or renting a 15-17 foot canoe for the trip, but I'm kind of on the fence. Will a larger boat make the trip noticeably easier (aside from portaging)? Thanks.