Yes, sounds like you do not have an automatic transfer switch that connects the generator if the shore power is not connected/available. Instead, 'you' are the transfer switch - plugging the shore cord into either the generator outlet or a power outlet/pedestal.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.