If you are going to have a lot of luggage, I’d suggest a private driver. Your hotel can help with that or you can email Mauricio Bonilla (in English) at Mauricio Bonilla <gbsmaury@hotmail.com> — and he can arrange transport with his father. Probably about $60 total (not per person). I am hearing that there are still kinks at the new airport and you need to get there 3 hours ahead of your flight. There are buses from Quito to the new airport but I am unsure about the routes between Otavalo and the new airport. Like Edd said, your best bet is to ask someone in Otavalo. You may have to take a bus to the nearest large town (El Quinche, perhaps) and then a taxi from there. If it were me, I would hire a driver. The roads still aren’t finished in and out of the airport and a lot of detours are necessary at this point.