My girlfriends have been introducing me to all the trails nearby. Last week we went down a section that was fairly steep and there were drops over railroad ties every ten feet or so -- about eight of them. Same as your logs it sounds like. I was a little freaked but just got my butt back off the saddle, loosened my arms up and rear-braked a tiny bit between each one. Crashing can freak me out too but it's like riding horses, you gotta get up and do it again.

Further on we went through a bunch of rocks/ baby heads (gross term!) and I was confident enough to just roll through and over them. It's true, experience comes with time, and maybe someday we will take those drops with "both tires off the ground"!