Tree blowdown isn't always an easy obstacle in Sol Duc. Dickey shouldn't be too bad, you can probably just climb over the downed tree. There are parts of Sol Duc where the trees might be 5 ft diameter and sitting about a foot or two off the ground, so you have a big road block. Sol Duc I'd be more worried about washouts, there was a big one that took out a huge section of road a few years back and there are bridges in there now that have big potholes as you leave the bridge surface. There's been a good amount of snow up by seven lakes basin recently so it might force some of the elk out of the park and down to the FS land. Dickey should be plenty swampy, especially in the clearcuts. On the bright side, most all the tracks will be washed clean and good mud for the elk to leave new ones.