I'm sure someone will disagree, but. When doing a even few birds at a time, I sometimes don't have room to BRINE my birds either, not with all those eggs in there. I do like Mom and Grandma did and freeze them. When you want chicken, defrost, let rest (normally called Marinate in my family) for a day or more. When I do this, I mark the age of the bird on the package, so when I marinate I know how long to do it. I usually marinate for 2-3 days for a very flavorful bird, marinating either before or after I freeze. I do Brine, to release all Blood from the bird, drain, and mix up my Marinades right into the freezer bag. When I want hicken, I just decide whih flavor I want. When I am out of something, like sausage right now, I plan for the next processing day.
My husband is a finatic about dark on his white meat, so I brine (salt water). He has sent more chicken back at restaurants than he has eaten.
Normally though, I butcher a few at a time, brine, drain, put in a marinate and freeze while we eat one or two of the birds the next day. I do not raise Cornish X as I will not eat a bird overbred to have heart attacks. I just don't feel they are fit for human consumption, my personnal opinion. Besides, I like a bird that has flavor and I don't think they do, no matter what you do to them. They just don't taste like chicken of years ago. And yes I've been around more than a few decades, prior to commercial chickens.