Well, Stormi, I used the word "strange" in the kindest possible way......
Bruce and I did this very trip last Labour Day weekend with a newbie female rider in her second year of riding and on a '99 Kat 750, to boot. Her riding skills were what I considered "reasonable" and she had no probs staying with us. Even though we got away from Cowtown a little later than I'd have liked (~11AM Saturday), we still managed to get to Toad Rock/Ainsworth with a little daylight left to set up the tents.....but finished up using flashlights. We did NOT burn up the roads and ALSO managed to miss what would have been the "perfect" ferry sailing from Kootenay Bay to Balfour.
Keep in mind that that was also in September so we had already lost a lotta sunlight. June at the time of the solstice will give us good light until at least 10:30 local time so no probs.
The big caveat here is, of course, the presence/absence of rain. If it's absolutely pi$$sing down then all bets are off as to times. In my experience you can add about 20% to your trip times if there's lotsa water on the road......
Hopefully we'll be blessed with +30C and unlimited sunshine all weekend....