Upper Rickreall Creek, has nice native cutties. It's a hike in situation. You have to park, by a gate and walk upstream. Do NOT drive a vehicle in their, even if the gate is open. You WILL be arrested for TRESSPASSING. The property owners are VERY adamant, about that. ABSOLUTE NO motor vehicles. Some dumb ass started a serious forest fire up there, a few decades ago. So you can only walk up, or ride a non-motorized bicycle.
And it is patrolled, by State Troopers & County Mounty's. I belive that it is also, a "no bait" stream. So flies and lures only (spinners, spoons, etc). If memory serves me, the gate is at the intersection of Martin Road & Rob Mill Road. You turn OFF of Ellendale Road, just before a bridge that crosses the creek.
Morgan Lake is not listed either in Fishing in Oregon, nor the Complete Angler's Guide to Oregon. That typically indicates that, the lake is private. So I'd encourage a door knock, or two, to get owner's permission.
There's a old mill reservoir, in Willamina, called Huddleston Pond. It's stocked w/ trout. But it's VERY weed. So trout fishing, is tricky at best. But, it probably holds bass too. The Yamhill River, incidentally, flows right past the pond. Maybe you can get permission, to fish the stream while your there--or instead of fishing the pond.
The Yamhill (main stem, north & south forks), are all worth a try for trout. And at Yamhill Locks Park in Lafayette / Dayton, you'll encounter multiple warmwater, and cold water species, including bass, cats, 'gills, crappie, bows, cuttties (some fat SRC's too), and even nooks! That would be, an easy day trip for you.
If you don't mind, or enjoy, Catch & Release only...try a bank or tube / toon trip to McGuire Reservoir. It's situated NE of McMinnville--and appears to be due west, of Carlton on the map. It's a water reservoir, operated by Washington Parks & Rec. So it is patrolled too.
Well that ought to, get you started. Good luck.
