Thanks everyone! We ended up finding started pullets from someone in the mountains outside of Boulder instead of from Wardles, and they arrived today! They were raised by a CSU poultry grad and his son about the same age as mine was involved in raising them. Here is our amazing coop that it took 5 guys to get into our backyard and our new pullets:
We ended up going with ten week old pullets- 2 BRs and 2 RIRs. So far, the BRs seem right at home but the RIRs are a little bit skittish. We'll see how they are after they get all settled in!
Great looking coop. In my personal experience, RIRs are not as naturally docile as BRs and can sometimes become aggressive as they age. However the way to a chicken's heart is through its stomach and I'm confident that you can tame them down with treats.