I was thinking that if you have some flexibility in your schedule, August is a really nice and interesting time to come, partly because that's when the salmon are here.
Certainly, there's an experience to see freshwater fish throughout the open water season, but the salmon are in the Yukon in August, and these are some of the longest salmon runs in the world. They've come up 3,000 kilometres from the Pacific Ocean, and to see them arrive in the communities in Yukon at that time of year is a celebration of the natural world, but it's very much a cultural celebration as well. People are very excited to see fish come back to Yukon. It means so much to them.
In Whitehorse, certainly, they're here in August, and a little bit sooner in some of the communities downriver, like Dawson City. I would recommend coming up in late summer. It's an excellent time to see some of the fisheries resources.