Helicopter Tours in Alaska: TEMSCO Helicopters provides spectacular views of southeast Alaska from our bases in Juneau, Skagway and Denali. Fly with Alaska's most experienced tour operator on our award winning helicopter and dog sledding tours. Charter Services: Accustomed to remote and sometimes difficult operations in Alaska, TEMSCO Helicopters has the experience and range of aircraft to support your needs. We offer service in the lower 48 and Alaska with bases in Ketchikan, Juneau, Petersburg, Skagway, and Denali.