Why would you even want to try. I mean other than the fact that you don't have a bird dog. For me the dogs point is as beautiful as the covey rise.
In answer to the question Bob White Quail whistle in the spring. It's a mating call. It sounds like bob-white, bob-white. The covey makes very quite chirping sounds from time to time when on the roost.
If the birds are plentiful in your area(they haven't been in GA in a long time)should be able to walk up birds if you know where to find quail.