Yeah, it's a very small list, just over 30 men, you're gonna be hard pressed in games. I'd maybe drop the Wolves and the Dreadnought and take another 10 man Grey Hunter squad. I can't help but think your lack of numbers is really going to hurt you. As Ginger Farseer said, 2/3 games, you're going to be in trouble. The Thunderwolves are nice, but in reality, they can't take your opponents army on their own.
I love Wolf Scouts, but i think yours are slightly too basic, they're one of the best units going, i run mine with MotW, Meltagun, 2 power weapons, 5 meltabombs, and a pack leader with a powerfist and a combi melta. They're the best unit in my army. They're around 200 points, and have never failed to get their own points, and then some, back for me. With just a meltagun, i'd probably drop them as not being worth it.