Camo helps, but its not an end all beat all. I also personally feel like new camo is way too busy and you need to review it in the store at 20 yards on the rack and I'll garentee you in the shade most look like a dark blob.
I have been using the Us Military woodland camo, and its starting to wear out. Its way over priced to buy now. I am considering changing to German Flechtarn or the swiss army camo. I think both would hide better than realtree or mossy oak.
More importantly Good boots, maybe quilted overboots, warm coveralls and jacket. Then worry about camo patterns