Hey Nica,
On streams, your method of presentation will depend on bait/lure/offering you are using. In any case, you should be sure to use lighter lines in the 4-8 pound test range. Trout can be very line shy. 4 pound for clear water and up to 8 pound if the water is dirty. One technique that you might try, is using a Hi-Vis line with a clear leader tied on below that. Hi-Vis line makes it so you can see better where you lure is in relation to the potential snags.
You can use spinners like Mepps, Panther Martins and Rooster Tails, or other hard baits like spoons, Rapalas and swimming jigs.
To present the hard baits, you should cast upstream and across the current and retrieve fast enough so that you don’t allow your lure to sink to the bottom and hang up in the rocks. If you use a spinner, as soon as it hits the water, jerk your rod a little to get the spinners going, then retrieve just a little faster than the current so you keep the spinners turning. Letting the spinner just flutter to the bottom of a eddie or hole also can work, but if it goes too far down, it could get snagged on the rocks. You can cast down stream and across then retrieve up up stream to you as well.
Don’t worry too much about trying to make a spinner look like something too natural when fishing downstream, it just has to kind of look like a minnow caught in the current where it shouldn’t be. River fish don’t have too much time to investigate your lure closely - they have to react fast or the potential food item will be swept past them.
Try to be specific and fish the structure in the stream - that’s where the fish will be holding. Look for large rocks and fish right on the down stream side of them. Or, look for where there is a marked difference in the current - like where faster water meets slower water and creates a seam.
On the sections of the Provo that allow it, You can also use baits like worms, grubs, minnows, salmon eggs, or insects. Tie on your hook and about 12-18 inches up, use just enough split shot to get the bait to bounce along the bottom. This method works better in the areas with slower currents. And, when using light weighted offerings, don’t try casting too far - it won’t really work.
In the eddies or back waters you can use a float/bobber set-up with baits or nymphs, but that will require you to be more familiar with the depth of the water and some of the different float/bobber techniques.
My over all hands down favorite method for stream/river fishing is to use a Fly rod and dry or wet flies, but that would require you to get more equipment and learn the Fly Fishing methods. If you chose to do that, you would not be sorry, as it can be very rewarding.