If he’s all about the outdoors, then it’s time to give him a hand and help him live the dream. There are endless camping, hiking, and outdoor activity gifts to grab for them. If you can get a look at their current setup, then you’ll know exactly where to go from there. For these gents, it’s about function, and being lightweight (since they’ll be hauling all this stuff on their own).
If you’re zoning-in on their interests, use the knowledge at your disposal to garner a good foundation. If you’ve heard anything in passing, such as, “I’d really like to do this, but I don’t have X to do it with,” you just figured out something vital: they don’t have everything they need to complete their desired tasks, and you now have a much more narrow margin of error. Bonus points if you remember exactly what they said they needed, even if it’s something that’s not inline with your interests.
So you’ve gone to all the trouble to find what you thought was the perfect gift, only to read the expression on their face, and thank the stars above that you kept that gift receipt or proof of purchase. This is where you’ll have to pay serious attention to shopping online. Buying from stores that have brick and mortar establishments nearby will allow you to go with them, and physically exchange the gift for one of two things: store credit, or an item of equal or lesser value.