RV pad with 125amp sub-panel
Nope.  Subpanels and bonding screws do not go together. 

The only way you would be using the bonding screw is if this meter was a separate service from the electric company, and he was paying the electric company directly. 

Who is paid isn't the issue, but rather, it's how the service is delivered to you.  Power companies supply service which is potentially "floating" or subject to transformer leakage (lifting it to thousands of volts), and you cannot count on the power company's neutral being anywhere near ground.  And the power company does not supply ground.  That is why the first point beyond the power company must be grounded. 

Remember the NEC rules that let you supply a 120V outlet, a TT30, a NEMA 14-30 and a NEMA 14-50 socket to the same pad, and only need to deliver 50A powe to all that. Idea being different RVs use different ones, but none use more than one at a time.