Welcome Mackie Forums Refugees!
I'm going the other way, trying to mod one of the older trays so I don't have to take my Air out it's case. Think I'll have to grind some of the dock away, though.
I use a 6ft lightning to USB connector without any issues so I would assume the lightning-f to lightning-m shouldn't either, like this one http://www.fasttech.com/product/1295802-lightning-8-pin-to-lightning-m-f-extension-cable or the one Walter suggested but lightning to lightning instead.
Do you often find yourself using both a docked and wireless iPad for control simultaneously?