Avoiding AF when possible is always best. There are wireless solutions that will allow you to rack focus wirelessly. If you have rod supports, you can attach the focus device to the rods while you hold the remote, which is basically the dial of a follow focus, in your hands. DJI makes a device called the DJI Focus, which you can get on B&H, but you can actually get it a little cheaper on Amazon here: http://amzn.to/2e3c7fy
There are cheaper alternatives, like the Lenzhound system here: http://amzn.to/2eeOThZ. Honestly, I don’t know a whole lot about this system, but it seems to get OK reviews.