I can recommend these products for killin yotes.
This coyote howler
is the easiest to use and the smoothest sounding howler I have owned. The bands are replaceable and the call body is spray paintable to make it match your camo colors.
On this page
Scroll down until you find the model AP-2 and AP-3 cottontail and jackrabbit in distress calls. I really like the shape of the mouthpiece and the ability to replace the reeds as the need arises. The reeds are available from the manufacturer. Sorry I couldn't find a homepage for this company but their contact info is on the package. BTW his big trumpet like howler is the worst I have used.
I got an electronic call last year and haven't given it a much of a try so I won't comment on that but I will say that if you use the calls above at the right time and the right way and keep a good watch on your technique you will see more dogs than just driving around. And you will have some of them come into kissin'distance if you are real lucky.
Keep an eye out for other predators as well. Bears and mtn lions will come into the rabbit calls as well.
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I haven't the foggiest how to call in the yotes.
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The howler is most handy during the highly territorial breeding season (mid winter) and when the pups are old enough to venture out of the dens and get their butt kicked by a coyote from another team (Late may and June).
I have found the rabbit calls work best on foggy mornings after a few days of rain with no moon. That is when they are the hungriest. It will work anytime though. Give the call a chance to work. 15 minutes in a spot should do but if it is a good spot that has produced before you may want to give it 20 minutes or so. Don't over blow the call duration wise. Give it a good 30 seconds and then wait for 5 minutes. If the yotes are there they heard it. They just need time for their curiosity to work. Sometimes its 5 seconds and sometimes its 10 minutes. You almost can't over blow the call volume wise. You are not imitating a rabbit with a hangover. You ARE imitating a rabbit that is being peeled alive. Small lungs screaming for all they are worth.
I also have started using a crow decoy (actually a plastic crow we bought for Halloween for a buck) and a stuffed rabbit skin (but any rabbit sized tan or grey stuffed animal will do) posed together. The idea is that when the yote sees the crow snackin on a rabbit he will come in to take it. That technique put my shotgun about 12 - 15 feet from the last dog I called in.
Hope that is some of the info you are looking for. Let me know if you have questions.