Glacier National Park is a popular destination during the summer months, drive times in and around Glacier National Park vary considerably due to varying speed limits, traffic, weather, wildlife, and congested parking lots. Travel to the park may also be delayed due to road construction projects in outlying areas.
Allow for extra time when traveling to your boat tour location, check Road & Trail status from the National Park Website before departure: https://www.nps.gov/glac/planyourvisit/road-trail-campground-status.htm
Be prepared to present proof of your tour or rental reservation at the Two Medicine, St Mary and Apgar entrances of the park, in peak season closures can occur due to congestion in the park. You will be allowed entry with either a screenshot or printed copy of your reservation confirmation.