Leave your 8Wt at home, bring a 5Wt, at most a 6Wt, with a dry line for nymphs and a sink tip line for streamers, 3X - tippet - 10foot leaders for nymphs and 2X - tippet 7foot leaders for streamers.
One option to get to Calgary is to get on a commuter flight via Westjet airlines when you get to Edmonton and fly back to Edmonton later in the day on Sunday, then drive to Jasper (about 3 Hrs). Alternatly fly to Calgary on Saturday, then up to Edmonton on Sunday and on to Jasper drive. ither way, this is a hectic pace so my suggestion is to get out in Jasper on Sunday and enjoy the magnificent scenery that the Rockies will give you. Better to plan another trip next year to Calgary! I'll make sure you get to fish the Bow river.
Pete AKA Frenchcreek from Calgary