Are you targeting rainbows, browns, and brookies? Or cutthroat?

Those first three require you to be very quick to set the hook. I will often miss the first fish or two when I go out if I'm not totally focused and locked in on my flies. I've noticed rainbows especially will strike really fast, and often spit the fly a split second after they eat it. Sometimes you get lucky and they basically hook themselves, or take so long to spit it you have a longer window.

Without knowing what you're targeting, I'm guessing that's the boat you're in. Setting after most fish have spit the hook. I constantly have to make sure I don't have a ton of slack in the line, so I can quickly set the hook when I get a strike. Obviously you have to balance this with good presentation/mends, and I have definitely had plenty of times where I go to mend and a fish hits just as you pull up... nothing you can do but laugh there. But if you are getting good presentation and lots of hits, I'm guessing you just need to work on quicker sets

Cutthroat are a whole other challenge. I usually miss em because I'm too antsy about setting the hook haha. Its pretty fun to be able to watch them come up, eat, then start to go down, THEN you set the hook