I have already done a presentation on that feature on Uyuni, so it definately will work on your SUMA. Keep in mind that the dates in 'https://access.redhat.com/articles/3078' is when the last package was synced to the channel - so it is safer to pick at least 5 days ahead of that.
Once the new parent (+ childs) are created, check the version of the kernel as a simple check if it really is version locked.
P.S.: Sadly, this approach does not work for CentOS, so the simplest way is to setup channel creation every day (maybe a script) and them delete all but last channel - so you will have a kind of 'to_date' .
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