Thanks to everyone for your input. It looks like we have pretty good agreement on sized #12, #14, & maybe #16. I will definitly whip up a couple of dozen GRHE in those sizes. I will also take Peter's suggestion and try a few in larger size. I tend to agree with Peter that larger sizes can work well, plus they are more attractive to bass. Brim that can take a # 8 Wooly Bugger shouldn't have too much trouble with a #8 GRHE.
Jim, thanks so much invitation to join you on Lake Moultrie. I would love to try out some your legendary fish and pick up a few tips from the master. I will definitely take you up on the offer this spring or early summer.
Peter, I tie my brim gurgle pops in #12 and #8. My #8s are tied with a double strip of foam to increase floating ability. They are big. I get lots of big brim and bass on them. I call the single strip gurgle pops "low riders." I also tie bass gurgle pops in #4, #2, #1/0 and #2/0 (all with double foam strips) As you can see, I like big flies for my warmwater fishing.
Thanks again to everyone for your help and suggestions. 8T