I'm sure that you've looked in your OPS specs manual to see if that is addressed there. Does your home airport have a requirement for badges on the ramp?
As far as the feds (TSA) are concerned, you only need a badge in the SIDA area, which is basically the air carrier ramp. The TSA couldn't give a rats patooey about anything associated with GA. This does not apply if you're going to DCA though. At some airports, you have to be escorted on the ramp if you're a visitor, same with your pax.