Hello,
Yes. I Agree.
Till the Time, the IP Addresses does not change, should not be any problem. Again, in your case SEPM is good, so I don't think there would be an Issue.
I would still recommend you to take a Back-up of the Database and follow the steps provided in the Article below for Backup. (Just incase..)
Best Practices for Disaster Recovery with the Symantec Endpoint Protection Manager
http://www.symantec.com/business/support/index?page=content&id=TECH102333