Simple Pergola Plans - T003 DIY. They don't get more simple that this. Pergola plan with trelliswork that can be stretched to about 12 x 12 and has detailing for trelliswork as well.
As usual with GardenStructure.com plans it has step by step instructions, material list (as shown), and full size templates for any sculpted parts and a stain guide to help you make it last. Switch to 6x6 posts and use hurricane clips if storms are a concern. These are all materials that are easily found in any local lumber yard.