I'm not specifically familiar with your boat model. But generally speaking, you shouldn't need to reef in 8-10 knots wind. A single reef may be advisable once you get to 15 knots true, if you're sailing upwind.
You mention that the boat is trailerable, which suggests to me that you rig/derig it fairly routinely. That opens up more possibility for the rig to be improperly tuned.
One thing that can cause excessive weather helm is too much mast rake. If you've ever done any windsurfing/boardsailing, you'll remember that pulling the mast aft turns the boat up into the wind. The same thing happens with a fixed-rig. Excessive mast rake usually results in too much weather helm.
You might try experimenting by decreasing the length of the headstay/forestay, and increasing the length of the backstay. In small increments. (You likely will also have to adjust the shroud length/tension to do this). Some moderate weather helm is desirable, so you definitely don't want the mast leaning forward, which could lead to lee-helm.
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Pacific Seacraft Crealock 31 #62
NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT