Tough question. It depends on what you’re looking for, really. The most scenic is probably Barclay. Baring towers over head and it is truly impressive. But even though you won’t find solitude at any of these lakes Barclay is the one most likely to be a zoo. Boardman is nice, but I’d be inclined to go there when you can keep going past to the lakes above. I think I’d take Beaver Plant because if there are people around then you can go on to the Ashlands or Twin Falls.