Just to follow up on earlier comment re Saskatoons, it looks like Jeffries Nurseries near Portage will have a variety called Parkhill that they sell as a dwarf Saskatoon. Said to be 5 ft tall. Might also but worth seeing if one of the locals carries or maybe even could bring it in from Jeffries!
Jim-001: Must be fun to be starting with a blank canvas! If I hadnt already planted all my haskaps I might also look at Boreal Blizzard, the berries from it look massive. Thanks for that tip re Veseys, will look into it!