We have a 39' Journey towing a Ford Taurus and did the trip in '14. I second everything rascal said.
We left the 8th of May, from central Al, and kind of sprinted until we reached Banff then we slowed down to around 250 miles a day. If you leave in late April or early May some of the smaller roadside parks and lakes may still be frozen depending on how late winter sticks around.
I have Ready Brake for my braking on the toad and also used the Protect a Tow. The only problem I had was because of the extra length the Ready brake added,it pulled the net for the protect a tow away from the MH and car. I didn't suffer any rock damage, just some tar spots around the edges where it was narrower than the width of my car. They do make a bigger version and I'm going to get one.
We had Verizon with the Canadian package. It worked near larger towns and was spotty the rest of the way.
Its a wonderful trip we're going back in a couple of years! Have a great time!