Michelle, based on my limited knowledge of these autographs (yet vast knowledge of Fred & Barney - and Tigger too), I think they look good. One thing you could do is just put them on eBay for a huge price so no one would buy them, and then do a quick opinion through PSA/DNA for $10. If PSA gives them the thumbs up, I would rest easy, because then you've got the okay from both them and RR.
Nice pics, hopefully they won't insult any terrorists! The Flintstones and the original Scooby-Doo were my favorite cartoons growing up.