Well for log rides it would be quicker to come from the Padden side. Just park at the galbraith mtn parking area up Samish Wy. from Padden park, walk up galbraith mtn drive or whatever that road's called, and follow it until it comes to a private dirt road, continue on that road until you reach the logging roads' gate. Then walk up that road 'til the blue rock, and directly to the left of the rock is Shawn's trail, which has a ton of great drops and a few ladders, to your right up the road fair distance is Scorpion, which has a really long log ride/ladder, and a few other smaller ones, or to the left of the rock following that road a way is 9-1-1, which has a really long, easy ladder.
It's kind of hard to explain how to actually get to the trails though. I suggest getting shown your first time.