Consistency is definitely the key, but you can consistently show up and do work in a manner that isn't the most efficient means to your goal. So I'd add a caveat, that consistent precision is key.
I've got a degree in Exercise Science, so I nerd out on this kind of stuff. I could get into the nitty gritty physiology of it all, but at the end of the day it really is pretty dang straightforward.
Specificity means training the systems you are trying to improve. If you want to be a beast in the mountains, you need to spend time in the mountains humping a pack. Period. Your legs, lungs, and heart work in synergy while backpack hunting, prioritizing training volume here will pay dividends.
Biking, running, sprinting, etc. are all fantastic tools, but they still don't have a 100% transfer rate like a good old heavy ruck in the hills. I like to plan on one overnighter a week during the summer to scout and pound out the miles, it's incredible how much of a machine the human body becomes with a technical approach to training.
During the winter, your focus should be on adding/maintaining horsepower (depends on where you're at already). Avoid "junk volume" like the plague and focus on heavy compound exercises with a full range of motion and textbook form. No one has ever thought to themselves "man, I wish I wasn't so damn strong" while solo packing a deer out of the wilderness.
I always describe performance oriented fitness like building a really fast car. You need an engine with enough horsepower and torque (strength/muscle) but you also need to be able to get that motor enough fuel and oxygen (cardio). Put the two together in the right ratios and the human body really is an impressive machine.
Last bit, don't neglect to put AT LEAST as much time/energy into your nutrition and recovery protocols as your training. Can't tell you how many folks spend years spinning their wheels and making minimal progress, blaming their training, when the culprit is really what's going on in the kitchen and in their sleep routine.
Good luck!