VMware Snapshot Longer than 3 days
Solution 1:
How do other organizations deal with this?
I do more or less what you're doing. Keeping snapshots around for a few days for a specific reason isn't bad. You just need to make sure to not forget about them and let them "rot" for any longer than is needed. I have my monitoring system set to alert me if snapshots stay around for longer than three days.
Is there a way to "backup" the snapshots?
Not backup the snapshots per se, but better than that - use a product like Veeam to backup your VM images on a regular basis.
Solution 2:
In my opinion, the simplest way will be just to backup VMs regularly, as @EEAA mentioned before.
We have quite large amount of VMs running in our environment. So we configured backup Every 1 week. Our setup is StarWind + Veeam.
Also, we considered other solutions, e.g. MS DPM, but encountered some issues with it. Veeam just works great.