Do a search on the web for benefits to initial stockings of fatheads. They are GREAT for building up a huge forage base for the bass to feed on. Ideally they should be stocked before the bass. I'm not sure if stocking bluegill with them will hurt spawning production a lot, but look at it this way...it won't hurt to stock the fatheads before any other fish are stocked. I'd stock'em in the spring and let them spawn like crazy up to at least mid to late summer, then stock the bluegill and bass. You might also want to check on the possibility of stocking golden shiners along with the fatheads IF the golden's won't eat all your fatheads. Read an interesting article on a public lake that was initially stocked with fatheads and allowed to spawn for a year or so before stocking other species. The growth rates of other fish were outstanding over the new few years as they got real fat on the fatheads.