Apple Airport Extreme setup advice

I am setting up a wireless network in a conference room that is about 5200 square feet. Initially, I was going to setup just one Airport Extreme, but I think I will do two now. I plan to connect both APs to a single switch. It looks like extending the network range involves hooking one Airport into another - like daisy chaining them, I guess. Since I am going from one switch out to the two APs, should I just set them up independently and use the same network name (not choose extend the network on either setup)? I want to create a single wireless network so that clients can move from device to device with no interruption. Since both devices will probably be close enough that the wireless spectrum overlaps, should I manually set the radio channels on both or just leave them both at automatic? Thanks for any advice on how to set this up properly.