Need more info. I deer hunt in the white mtn national forest, ie all public, LOTS of room. There are often cars parked at the logging road when we get there and we never see them.

If its lots of room, sure head in, but if you find them in "your" spot, move along quietly.

If its a small spot, move along without getting out of the car. Did this during youth turkey weekend with my 14 year old. Had a bunch of birds roosted in a field, short walk in from the road. We get there early enough to get setup and there's a car there. They had seen the same birds the afternoon before. We moved on, they called in the birds and missed.

Just be nice and do what you would like others to do if it were reversed.