We did a similar trip in 2022, so COVID was still a lingering issue. There were restrictions on going into Canada on the train, so we rented a car in Skagway and did it on our own. It was one of the best days of the cruise. The car was waiting for us in the parking lot right outside the ship, and we dropped it off there when we were done. We stopped along the way to hike and see the scenery, had the suspension bridge pretty much to ourselves, walked around the Carcross desert, stopped at Tagish Lake Kennel and took a 4 wheeler ride with the dogs, and hit the miner's cemetery on our way back to town. Be prepared for any weather in September, we were there in early August and the temps dropped from about 70 to about 35 and we had sleet on the way back.