aight this aint rocket science, lets figure out what you're not doin or doin wrong...
keep your vehicle hidden from the area you're gonna be calling, keep it way back... a couple years back I was out with another of our brethren, snowing but not that bad... we pulled into a spot parked on the road, walked into the field, maybe 25 yards and started calling... lo and behold a fox shows up down to our right, never expected to see one come from there... instead of coming across the snowy field, lazy rascal turned out the road and started coming to us... was all good till he came into view of our ride, off into the wild blue yonder, could read it all after we came off stand... hide the ride...
I normally wear the brown Carharts when calling works real well in corn/open fields... I do have a decent set of snow camo coveralls for what most of your area is getting now... an old white bed sheet with a hole cut for your melon will work if you have nothing else...
lights, turn your scanning light on when you walk out into the field and keep it on and keep scanning when you're walking into your stand... get set up start calling, and continue to scan... when you see eyes DO NOT take your light off them till you have fur on the ground... when an animal commits to the call and is coming in quit calling... if he hangs up give him a couple squeaks on the mouse call that'll normally get them moving again...
calling... when you get set up start with a short run of mouse squeaks, 45 seconds to a minute, 2 times... a minute or 2 between sets, start off low and increase volume till you end at full volume... if nothing, start off with a run of the broke bunny blues, again on the low side and increase volume as you go along, one to 2 minutes still continually scanning...
you can from here go into other sounds as you feel comfortable with... remember you're imitating small prey in pain, keep your sounds fairly short and choppy a rabbit doesn't let off a 2 minute long screech, nor will a bird in distress... still continually scanning...
me and my partner would normally go through 5-6 sets on a stand, about 20-25 minutes and we were gone still scanning till we got back to the truck... one of us would be on the gun the other calling, tripod between us looked like a big ole haystack out in the field, remember your light is your shield... if you're doing anywhere near this there's no reason you shouldn't be seeing animals...
good luck with'em...