Here is what I've been able to figure out about using AirPlay and getting it to work properly.
I sometimes need to turn Bluetooth off to make it work properly iPhone requires this but iPad2 doesn't seem to have the same problem for me.
Extending your network will cause skips whenever you roam between base stations. Only use extended network if you really need it. I would go to the trouble of running between the base stations and then set up without using extend or wds. Each station gets a different channel but you can set the same name for roaming between stations. If roaming causes skips, you can set up different names to prevent roaming. Powerline network adaptors can be used to brig the devices if running wires is not practical.
My microwave can mess with my wireless network. Switching channels didn't help, however switching to 5ghz N did help.
I have ask to connect on, but understand others might experience different issues depending on their unique wireless environment.