Antelope vision is like 10 power binoculars so it is hard to put something past their eyes.Dressing to match the terrain is a start but having broken terrain that you can stalk in helps a lot.I have yet to try a ghillie but think it would work really well,especially if you could get around some brush.
They do seem to have trouble picking you out if you are in brush.I have taken a few at 30-40'.My closest was from a box blind at 8 yds.I have noticed that at 30' and less,they seem to not see well.I think it is just like a high powered scope,it will only focus so close.I believe that under 30',they are seeing very blurry.They also have almost a 360 degree range of vision.
Antelope can wind you but their sense of smell is less acute than a deer's.
Open gates were mentioned above.Don't over look them.Antelope use them a lot,especially if there is a food source on one or both sides.A blind or ghillie at one of these could work really well.You may be watching antelope hundreds of yards away,thinking there is no chance,when all of a sudden,they decide to move and in seconds they can be standing right in front of you.
Having few water sources and or a dry year is better than a lot of water.But with a lot of water,maybe one open gate will be the ticket.
I haven't spent a lot of time testing this bt I believe antelope can't see nearly as well in the dark as deer do.I once walked across open ground in the dark,to get to a big cedar bush.When it got light,I found I had walked past 2 bedded antelope at 100 yds.They had no idea I was there.With no cover,100 yds is very close to antelope.
Don't be afraid to be creative.I have taken several antelope in fenced pastures by having a friend walk toward them and I set up on an escape route.They stay hundreds of yards ahead of the walker and if the escape route is a gap under the fence,they will mill around for awhile before going under.Once it is over though,it is over and that spot is done for the day.
I know of a few being killed out of tree stands.You can hide behind bales,irrigation pivots,etc.Look over your country and watch the animals and develope strategies.
The great thing about antelope is you can hunt them all day and if you blow one opportunity,there will be more.
Antelope are also built a lot lighter than deer.Hair is more hollow and lighter,they are thinner boned,skin is thin.They are just built for speed.Also the country is so open,you can watch them till they go down.No need for ultra heavy bows or ultra heavy arrows.Being able to shoot a little farther is a plus.Whatever setup lets you do that would be a good one.
I haven't bumped into a rattler antelope hunting in 15 years,but they are here and it pays to keep your eyes open when the temperature is 65 degrees or above.When it is very sunny and hot,say 80 + degrees,snakes should be mostly in holes or other shady areas.
Antelope can be very frustrating at times but are also a blast to hunt.The Montana archery tag is about 99.9 % chance for drawing.It is an either sex tag and sometimes,they offer a couple extra doe-fawn tags.