We went in Ram Lake entry point and then up to Horseshoe, then back to Vista and out to Morgan and the portage to e.p. 45 to exit in 2013. If I remember right the portage is fairly wide compared to others I have been on, and long. I would not say it is hard, there are rolling hills and a stream to cross.
However, we exited relatively light compared to our load when we entered at Ram. So it may make more of a difference if you enter with a full load of food. I still think it is a nice walk in the park, and would be bearable even with a heavier load.
As far as fishing is concerned it was pretty slow on Horseshoe. May have been there too early. We saw a moose on Horseshoe and we jumped a cow and a calf when we left entry 45 parking spot.