Mike, I would ask you do you plan on running two or just one anchor? I would recommend 2 36" or 30" bags due to the ease that the boat will be pushed if you do want to stick with 1 bag I would say directly out the stern 1 36-48" bag would suffice. I would honestly tell you stop in the shop, Ill set ya up with a bag or two, if you want something bigger or smaller bring em back swap em out no big deal man.