How do *you* beta test new RHEL?

Hi Folks,
We historically played it kind of loose on beta-testing the pre-release minor version updates to RHEL. That stopped after so many things broke in our environment when RHEL 7.3 dropped.

Now RHEL 7.4-beta is out and I've been working on limited beta testing of RHEL 7.4b on new purpose-built test hosts, but this is only a few hosts.

I'd love to hear how other folks are testing pre-release versions of RHEL within their environment. Are you opening the 7.4-beta channels to existing test hosts? Building new purpose-built test hosts?

Have you been able to roll-over hosts from 7.x-beta to 7.x-GA if you were testing in place on a subset of existing hosts?

Thanks!