I like antelope meat if it's taken care of properly. To me it tastes sweeter than deer but here are my rules.
Kill it before it knows your anywhere in the neighborhood. Any animal that's run a mile is hot and the flesh full of undesirable fluids.
Get the hide off it as soon as you finish taking your pictures. In the field, before it goes in the vehicle.
Get it on ice as soon as you load it in your outfit, Pack the body cavity with ice bags and pack ice bags around the rest of the large meat areas. Wrap the entire package, ice and all in a canvas tarp and cover the trap with anything else that will hold the cold air next to the meat.
Get it to your butcher or to a cooler as soon as possible, Never, ever let it get warm after it's dead.
Some folks like to age their meat, I usually don't age antelope very long and when I butcher it I do it myself so I can make sure not one hair or a single grain of fat is left on the meat.
Cook it any way you like wild game. In lot of tomato sauce, onions, peppers in a slow cook crock pot or cube and flour fry it like you would chicken fried steak. Dutch oven it with bacon, onions, potatoes and cartons, Marinate and bar-b-que is also good.
You don't need to over cook it but some folks like it dry, some like it moist. Us the same rule you us for lamb and mutton, NEVER, NEVER, EVER eat it after it's cooled off. Antelope must be eaten piping hot, above all else. You will not enjoy cold antelope regardless how it's prepared.
Any older animal, cow, chicken, deer, elk or antelope will be tougher and stronger than a young one. Tough and strong usually doesn't taste all that great regardless of the species.
DC