I keep meaning to treat myself to some decent Realtree stuff, but have aways made do with ex army myself. It's hard wearing and if you buy the right stuff its QUIET. A lot of the realtree clothes I've seen are far too "rustly" for my liking, and those that are not seen to be well out of my price range. Most of my shooting these days is with the .22 rimfire although I occasionally shoot full-bore and shotgun too. I work part time for a local pest control company and mainly shoot rabbits at dusk and lamp them into the night. Working on foot I like to keep things as quiet as possible. I have found that any "earth colours"(Soft browns, and greens, particularly dark olive) work fine for late dusk and during darkness, but for lighter conditions the only thing that truly hides a man is stillness. The instant you move about, wildlife picks you out whatever you wear. The army teach camouflage techniques with the mantra of things to avoid.. Shape, Shine, Shadow, Silhouette and Sound. Break up your outline, no shiney stuff, keep off the skyline and away from flat monochrome sufaces like walls, keep out of light whether it be the sun or artificial light, and rig your kit for "silent running" and you've done just about all you can do. The rest comes down to field craft and stalking skills to get you within range of your quarry unless you plan on ambushing them, as from a hide when pigeon shooting.
Having said all that I do know of one occasion when cammo gear worked against us until we sussed what was happening. We had a job clearing rabbits from a well used piece of public land and would shoot there evenings and at night time (With the council aware and the police well informed as well as suitable safety precautions taken) The rabbits had been persecuted in the area for some years before we got the contract, and ran for cover at the sight of anyone in green or cammo kit. Blue jeans and an everyday shirt was the order of the day. The rabbits ignored the everday visitors (dog walkers, lovers etc etc) but knew that cammo clad men meant trouble!