Hey Instamaker
You could do this commands on the shell (backup + on your own risk!)
We do them regularly but I could give you no garanty.
There is a new plugin which does some campaign_lead_event_log cleanups:
https://github.com/Leuchtfeuer/mautic-housekeeping-bundle
**Update: **
Sorry made a mistake in the audit log statement. Fixed it in the gist.
Greetings
Sebastian