If you can make this happen, do it!
We had already done some hiking out of Kennicott Lodge but we wanted to see more of the area. We took the 70 minute flightseeing trip that took us over so many glaciers, I lost count.
Our pilot did a great job of explaining the area and pointing out the various items of interest.
If we get a chance to go back, we'd do this again. Also, using Wrangell Mountain Air for access to day hikes looks like a great idea, too. This National Park is the biggest in the USA with few roads, so air travel is the way to get around.