Your choice. The resting process is to let rigor mortis pass. The muscles will tighten up and chew like rubber if done wrong. General rule is to let them rest at least 48 hours in the fridge. After processing, wiggle and move the leg. See how loose it is. After an hour, do the same wiggle. Expect some resistance as the muscle tighten.
You can rest the meat before freezing or after, but do rest it for tender results. Few people enjoy chewing rubber. After a bit, you can recognize the difference. Having said this, tough old birds are called tough old birds for a reason. They are.
Are these meat chickens? Are they young? Young ones are hard to mess up. The 2+ year old ones are tough and should be cooked at low temperature and slowly. Think simmering soup, gumbo or other wet and slow cooking method.
Search the site for young birds. They are classed based on age as fryers, broilers or soup birds. Best wishes and congratulations on your first butcher!