I ran the Renegade 1.8's for a while on my AWOL. They were okay, but didn't last long. I was lucky to get 1200 miles on the set, rotating them half way.
Right now I'm using Kenda Kozmik Lite tires in 29x2.0, and they are much better all around. They roll better on pavement, float over gravel well, handle singletrack like a champ, and last a lot longer. I've gotten 2,000 miles and I wouldn't be surprised if I get another 2,000.
If they made the Kozmik in a 45c, they'd be the perfect gravel tire.