I would NOT take any timid intermediate to either Fernie or Kicking Horse.
: My husband and I absolutely LOVE Fernie, but it's challenging, and a lot is ungroomed. The groomed blues have quite a pitch to them and some might think they are narrow (I don't recall any wide-open groomed blues, but perhaps someone will remember something I don't). I would say that Fernie is for adventurous intermediates and above. We are going to Kicking Horse for the first time this winter, but all my friends who have gone say the grooming is spotty, and there's the real chance it will be too challenging for your wife as well.
I will also caution that you are on a tight schedule. IF you get a dump of snow, you may not be able to get through the passes from Alberta to British Columbia and you could miss a flight.
You should really build an extra travel day in if you plan to do that.
Personally, I think you should stick to the Banff area. There are three wonderful resorts there, your wife will most likely love Sunshine and Lake Louise.
Norquay has some nice blues too, they are steeper than at some resorts but their grooming is excellent. My husband and I are avid tree skiers (Jay Peak is our home mountain). The trees at Lake Louise are great, I think you will love them. Norquay has some nice trees too. Sunshine doesn't have much for trees, you'll be doing more bowl skiing there. What's nice about Sunshine is your wife can get high up and get wonderful views, but there are blue and green trails down. Same with Lake Louise.
The Ski Big 3 option mentioned above is perfect for you. Cost of lift tix includes shuttles to and from mountain, so you don't have to drive. If your wife wanted to leave early, there are shuttles throughout the day so she wouldn't have to wait for you and you wouldn't have to go if you didn't want to yet. Only drawback I saw with the shuttles was you had to catch the very first shuttle, very early, to get to the mountain on a powder day for first tracks (if you were so inclined).
I've been to Banff twice, once with my husband and two stepsons, once with my mom. My husband and I are experts, one stepson is a high-intermediate skier and one is an advanced snowboarder (both were intermediate to high-intermediates when we went), and my mom is an intermediate (used to be an advanced skier, but now that she's in her 60s, she's a rather cautious intermediate). Everyone loved it and wants to go back. When I was with my husband and stepsons, we stayed at the Douglas Fir Resort. They have condo-style lodging. PLUS there is an indoor waterslide and pools, steam room, saunas, hot tubs, etc. (included in cost of staying there). We could NOT get the kids off the slide after we got back from the slopes.
And really, if you go to Banff, you will want to STAY in Banff. There's tons of things to do, and the town is pretty. You'll want to walk around, explore, etc.
If you want more information about these three resorts and the accommodations at Douglas Fir, as well as some other lodging too, go to my website, www.skisnowboard.com
, and you'll find full reviews of the three Banff resorts (as well as all the other major destination resorts in North America, so you can read about Fernie and Kicking Horse and see why I am steering you away from them). We write about the entire experience, from the atmosphere, to where to ski on the mountain by ability level and where to stay, eat and go for apres-ski. I am the one who wrote the reviews for all the Banff resorts and Fernie, so you can ask me questions, if you'd like (my husband is a ski patroller and had a lot of input on my assessment of terrain).
Of course, perhaps you can get your wife to agree to let you do a one-day trip via shuttle to Kicking Horse while she skis at one of the other resorts. If you're itching to go there, it's a great way to get around the problem of not having everyone happy there.