If I were you, I would prob do the Carowinds/SFOG trip thing. I did it last year, but I also had family to visit, conveniently located half-way between the parks!
They may not be the best parks in the world, but there are a ton of credits, I'd say it would be worth about a 4-day trip. Ride there, Carowinds, SFOG, ride back.
Plus it's a good ride. Lots of country music, firework stores, and kudzu. And crazy southern preachers on the radio on Sunday morning.