Ive never been huge on using a trailer for my spinner baits, but a lot of guys use soft plastic swimbaits. Keitechs are a popular one, some guys use flukes, and many use various brands and colors of regular paddle tail swimbaits. Usually in the 3-4.5 inch range. I suppose if you wanted to keep your spinner on the lighter side some sort of senko would work as well. I would stick to any plastic that is long and slender (ie. swimbaits, senkos, etc). As far as colors go, I would say use what youre comfortable with. I personally prefer greens as well, but I will occasionally use white plastics as well as plastics with a touch of chartreuse. I think if the conditions are right the bass will bite on just about any color.