Quilly, I was taught the same thing about only hunting and killing what I could or would use, this applies to coyotes too, at least for me. The pelts are worth some decent money once again, so if you can find a fur buyer or even a local taxidermist that might want your pelts, they can be sold!
Like MA Jay said, don't wear your orange, wear what ever camo blends into the surroundings best. You don't need an expensive electronic caller. For the most part, any predator call on the market will work. I'd suggest picking up a couple closed reed cottan or jack rabbit calls. If you've got an idea what a distressed rabbit should sound like, you're good to go. If you have no idea what the sound should be, I'd suggest picking up a predator hunting video and try to learn the sounds. Their eye sight isn't great, but they are very quick about seeing un-natural movement and they don't stand around looking trying to figure it out, they will turn and begin to leave, and if they smell you, they will leave even quicker. Best time is any time in winter, if it's cold they will come any time of the day, but early mornings and early evenings should be best, unless you can hunt them at night, as that is when they are most active. When you set up to call them in, stay on stand, and stay alert from the start to about 15 to 20 minutes. They may show up after just one series on the rabbit screamer and they may show up about the time you stand up to leave.
I'd say trying to call them in is your best bet when compared to spot and stalk or just sitting waiting for one to happen by, unless you've got a dead carcass of some sort that they are feeding on, then you could sit and watch it and maybe have some action. Good Luck!!