The course shown on any website would not be up-to-date. Rees Jones started renovation (or should I say, REDESIGN) work on the front nine in the fall of 2004, and the back nine in 2005, including rerouting the 12th and 13th hole. The course now plays to just over 7000 yards, to a par 70. Most tees were regraded or changed, with significant length added on a number of holes (three par 4s now are about 500 yards into the prevailing wind). Every fairway bunkers were changed. The old fairway bunkers were out-of play, not strategic, and not very attractive. The ones he put in place are very modern, about 280-300 yards from the back tee. Every green complex were changed, including green-side bunkers. The resulting green complex are controversial, let's put it that way.
There is absolutely no issue between the 17th and 18th holes. One great thing about the entire Royal Montreal courses (all 45 holes) is that the longest walk is perhaps from the 10th green to the 11th tee on the Red Course, and that's perhaps 100 yards, backwards which makes it noticeable. All other tees are right next to the previous green. It flows very, very well.
Honestly, it's not a course designed for exciting or fun golf. It's a test of mechanical shotmaking, with one long par four after another to tear-drop shaped greens with bunkers front left and front right. It's a stroke-play course, US Open-style.
Very little remain of the old Blue course. It's now a Rees Jones course.
The Red Course remains a Dick Wilson course.
Honestly, being a member there, if I want to have fun, I play the Red Course. If I want to "test my game" and have the course beat the snot out of me one hole after another, I'll play the Blue.
PS And by the way, it's not "supposed" to be the oldest club in North America. It is. ;-)