Movement, or the lack of movement is obviously the biggest concern of any deer hunter, bow or gun. However, proper camo is just another good tool for bowhunters at very close range, like playing the wind, good scent control and being quiet while entering a hunting location.
If you talk to the guy from Sleeping Indian Wool, he claims that the US military did numberous tests and studies and the best all around, year round camo involved shades of gray. Basically patterns similar to the military urban camo gray and digital camo gray.
After having first bowhunted in bluejeans and WWII camo and "old" wool in the 1970's, then I owned some treebark camo, then Mossy Oak, Realtree, ASAT, Predator, Cabela's Outfitter wool and Skyline, etc., I've formed my own opinions.
In the upper Midwest, it's my opinion that the Mossy Oak's and Realtree's are still a little too blobby for my tastes. Be it treestand hunting or on the ground.
ASAT is a good all around pattern. Outfitter wool green/brown is good for conifers/pines.
But in my opinion, if you choose to use camo over the old traditional checked patterns, then the best all around patterns are Skyline's green patterns for early season and then either Predator Grey, Outfitter grey/snow or Hightimber camo for colder weather once leaves start turning.
At least if you hunt the upper Midwest.
Here is the Sklylines options. Dayone Camo has these in some light fleece which is great for 55 degree's and over...
http://www.skylinecamo.com/online_store.php3# Dayone camo also has a great pattern that is a combo between WWII camo and Outfitter camo.
It's called Hightimber fleece. It's at the bottom...
http://ns1.bowsite.org/dayone/patterns.cfm Gray Wolf Woolen makes fantastic wool gear in Predator Gray. BTW, they also make great gear in a gray traditional check pattern too...
http://www.graywolfwoolens.com/store/pages.php?pageid=28 For a cheaper option of what I consider the other "best" all around cool/cold weather pattern, Colombia's snow/grey is the great for making one disappear...
http://www.rockydirect.com/product/1000074/0251-38 Also make sure to check out Gray Wolf's returned merchandise pages for good deals on premium camo...
http://www.graywolfwoolens.com/store/home.php?cat=26 One can debate all day as to what Ishi or the founding fathers of modern traditional archery would wear if they were alive and starting out today. Did the likes of Fred Bear wear what he wore because it was the best option in his time? If Fred Bear was a middle aged man today, would Bear Archery have his own signature camo product line?
What would Fred Bear or Ishi say if they hunted on for 4 hours on a -2 degree December morning in Michigan and tried a Predator Gray 27 oz wool/comformax lined bibs and jacket with matching bomber hat. I'll bet ya even that they'd come back to camp with grin and say "I gotta get me some of that!".
We'll never really know for sure, even if someone once talked to Fred Bear about camo in 1965. And that's what makes the wondering all so fun.
But either way, if you want to use checked wool or a camo pattern, just enjoy yourself and stay still.