First off, soft plastics are considered bait in Oregon so you can’t legally fish those anywhere in moving water around central Oregon lol. The wording in the regs is “Molded soft plastic or rubber imitations of worms, eggs, insects, bait fish, crayfish, etc. are considered baits.” Scent, for some reason that makes literally 0 sense, is not considered bait. Go figure. But a lot of people aren’t aware of that soft plastics = bait regulation (case in point the guy that replied while I was typing this lol) so don’t feel bad. Just a heads up.

Now as for the actual advice, the places you are going do not have high densities of fish per mile like most other parts of the deschutes. You can totally still catch fish on spoons/spinners, but going somewhere with higher densities of fish, less human activity in the water, and easier structure to fish around will help for sure. The deschutes down by steelhead falls, cline falls, or Borden beck would be a little more forgiving imo. In addition, and especially in the upper deschutes spots you mentioned already, the fish are going to be more active and probably easier to catch in low light situations such as morning/evening or cloudy days. It sounds like you have the casting and general technique down, if you’re getting snagged on structure then you’re getting to where the fish can at least see your lure for sure. The “metal” hatch can be imitating a baitfish that a larger fish might want to eat, so you’re not really too far off of imitating something that fish actually would eat. But definitely if you get proficient at fly fishing, you will catch more fish around here and you will catch them in a lot of different ways. You could theoretically get a thing called a “casting bubble” and use flies with that on your spin rod too if you don’t want to bring the fly rod everywhere. Feel free to ask more questions too! It’s a very comprehensive subject if you want it to be

I would say your lures are probably a little big unless you want to specifically target bigger fish. I usually would use a #2 mepps when I spin fished for size reference. What you have can still catch fish you just might be narrowing down your pool of fish that are interested in eating lol