I never driven thru the Crowsnest Pass so I cannot compare, as I taken BC 93 northbound thru Kootenay Nat'l Park in my 70 Ford 2WD Truck with my camper in Sept 2012 when I visited the Kootenays...
Driven BC 93 again thru Kootenay Nat'l Park in Oct 2018 southbound in my 75 Ford 2WD Truck with my camper in which I had to time it just right after their early 10 inches of snowfall and before the next stormfront on my way to Sandpoint ID via Spokane WA via Redding CA via Bellingham WA while having to revert taking the Alaska Ferry home because the roads in central and northern Canada were snowy and icy....
Their are two gradual grades on that BC 93 route between Trans Can 1 and BC 95 in my opinion that should be OK for a loaded U Haul trailer and a Toyota Rav 4 to accomplish the feat....
The North end on the Banff Nat'l Park side is around a long gradual 5% to 7% grade, and the South end is a little more hilly and winding with 5% to a short 9% grade and is not as long as the gradual mellower grade on the north end - neither of the two major grades on the entire route seemed bad to me.
Once you reach Radium Hot Springs at BC 95, the rest of the way is a much easy travel and relatively flat without any mountainous driving all the way to the Kingsgate-Eastport Border Port of Entry.
Hope this helps the OP.
