I'd look for them around the mouth of Indian Creek, the dam area, and the river channel running from the dam down to Starkey park. If there are calm mornings you should see some busting on top which well help a lot with finding them. Also keep an eye out for other striper fishermen and striper guides, generally they will be around fish.
If I was going to troll, I'd pull an umbrella rig with swimbaits that are close to the size of the shad that they are feeding on. Or I'd pull something like a 3.3 Keitech Fat on a 1/4 oz swimbait head, or maybe a 3.8 on a 3/8 or 1/2 oz head. Your Rattle Traps may work fine, I never fish them.
Water may be very clear on that end of the lake, fish might be very spooky, try and be as stealthy as you can be and get your stuff as far away from the boat as you can.
You can also get some brood minnows and Hook, Line and Sinker in Rodgers, drift them underneath a balloon.
Maybe bfishn will chime in, he knows a lot more about those stripey things in Beaver lake than I do. @bfishn
I'll probably start poking around up by Indian Creek late October, early November and will try and remember to let you know if anything striper related is going on.