As US state, US citizens only need a valid photo ID. If you are planning to travel from Europe, Britain, Canada, or Australia, then there is not a visa requirement, but you need to have your passport. If you are traveling from a different part of the world, you should check the travel requirements with your country's state department.
Since Alaska is a US state, tipping is considered customary in the service industry (like restaurants), but if you tip and how much is always an individual decision. It is recommended that you do leave a gratuity for the ship, captain, and guide if you are on a cruise.
In major port towns, you will be able to get strong, fast internet access and find accessible WiFi hotspots. However, most ships don't have internet access and our expeditions explore the national parks and the more remote wildernesses that characterize a great majority of Alaska, so you might go for several days or even most of your trip without internet access.
Contrary to popular belief, Alaska's cell coverage is improving significantly in recent years. Major US carriers from the continental states like Verizon and AT&T are gaining ground and establishing strong cell and 3G networks. Of course, in the backcountry, where many of our tours are based, you will encounter huge mountains and stretches of vast wilderness where you will not have a signal.
Alaska has the same sockets as the rest of North America - three-prong grounded 110V outlets. If you have devices that are 220-240V or that are not compatible with North American plugs, you will need an adapter and/or converter that is Type B.
The tap water in Alaska is considered potable and safe to drink. On cruises, confirm with your Adventure Life agent.
Alaska uses the US Dollar and paying with credit cards is pretty commonly accepted. It is possible that some smaller stores and businesses only accept cash, so you should have some on hand just in case.
We recommend you check out our Once You're Booked page for more information on buying travel insurance - it's always nice to know that you have it just in case.