Any tips on handling a large number of computers that are temporarily offline?

Any tips on handling a large number of computers that are temporarily offline?

Does anyone have any tips on handling a large number of computers that are temporarily offline?
We have a large number of computers that are temporarily in storage. They are cluttering up our computer lists for remote control, software updates, and patch management.
They will be going back online eventually and I don't want to loose track of them or the information about them in Desktop Central so I would rather not take them out of the SOM.
I have tried putting them in a Remote Office but that didn't work well. I also tried putting them in a Group which worked well for displaying them but not for excluding them.
Any advice would be appreciated.
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