I just found a roast chicken recipe that everyone in my family loves (miracle!) I'll put the link here in case anyone is interested:

http://www.marksdailyapple.com/slow-roasted-chicken/#more-52432

Like the other OP, I was thinking about making it for guests, and now I've got great info from that other post on how to cut it/serve it. Thank you.

My question is, if I'm cooking two chickens, how do I adjust the time or temperature--or do I?

This recipe calls for one 3-4 pound chicken, and baked for 3 hours on 300F. So if I did two, would it just be the same time, or because there is more cold mass going into the oven that has to get warmed up, should I add on time (or heat or whatever?) Do I put them as far apart from each other as possible?

Thank you!