I successfully AI'd the 2 does I attempted last year on natural heats.
The BIG trick to AI -- timing. You simply have to watch constantly -- you have to know pretty close to when the doe actually came into heat. You need to know how long it is average for *that* doe to stay in heat. You need to be able to time your AI as close as possible to the end of standing heat that you can. I'd like to try to use CIDRs on a few this year and tighten up that window some.
I wanted to do another doe last year, had it timed just right -- and then decided to live breed her because when testing her with an empty sheath, I could NOT get through her cervix. No way, no how. Not every doe is an AI candidate, so it's unrealistic IMO to think you can get completely away from having a live buck.
It is however, worth the effort because you can use bucks that you'd never have access to otherwise. That said, just because a buck has been collected, doesn't necessarily mean you should use him

I only want to use bucks that are better than those standing in my pens.
Tracy