Difficulty and Experience Required
Wrangell-St. Elias is not a good place to learn backpacking. The remoteness, the lack of trails, the river crossings, the weather variability, the navigation demands; all of it assumes competence.
Fitness
You’ll hike 5 to 8 miles per day with a 40- to 60-pound pack. That doesn’t sound like much compared to trail hiking, but the terrain slows you down. Tussocks, scree, alder, uneven ground; it makes for slow miles. Expect 6 to 10 hours of hiking per day, including breaks.
Elevation gain and loss is constant. Even routes described as “gentle” involve climbing and descending. Your knees and ankles take a beating.
If you can’t comfortably carry a loaded pack for multiple days over rough terrain, the Wrangells aren’t for you yet. Build your fitness elsewhere first. Or pursue a basecamp or basepack trip.
Navigation Skills
Trail-less travel requires the ability to read terrain and make route decisions. You need to be comfortable with map and compass. GPS helps enormously. It’s not a replacement for understanding where you are and where you’re going.
You should do a lot of research on your route before hitting the backcountry.
If you’ve only hiked on trails, you probably don’t have the skills for independent travel in Wrangell-St. Elias. That’s not a judgment. It’s a caution. Trail-less navigation is a skill that takes time to develop.
Guided trips solve this problem. The guide handles navigation. Follow them.
River Crossings
Glacial rivers are cold, fast, and opaque. You can’t see the bottom. Crossings require judgment and technique. Not every crossing is dangerous, but some are. All of them can be. Knowing the difference matters.
If you’ve never crossed a glacial river, you’ll learn on a guided trip. If you’re going independently, you should have prior experience with river crossings in similar conditions.
Self-Sufficiency
You’re days from help. There are no backcountry ranger stations. No emergency shelters, no other hikers to assist if something goes wrong. Carry a satellite communicator, a first aid kit, and the knowledge to use both.
Problems that are minor inconveniences near civilization become serious issues in the backcountry. A sprained ankle, a bout of food poisoning, equipment failure; here it has to be managed with what you have.
If the idea of that level of self-reliance makes you uncomfortable, hire a guide.