Just got back from another amazing trip to Ecuador. Larry at Small World Adventures made our trip with his great rental boat fleet. He even came to Tena and picked them up from us so we didn't have to stop by his place on our way back to Quito (maybe I shouldn't publicize that?). Unless you are staying for months, it is way less hassle and possibly even cheaper to rent boats than try to get the airlines to let you check them. He has Creek and Play boats. He also has some amazing cabins right on the river for his guided trips, but us dirtbag paddlers can only dream of the hot showers and cold cocktails on the deck overlooking the river. He is in Borja on the Quijos river. Probably reasonable to get in touch with him through the web site. If I looked hard enough I could probably find a phone contact for him. If anyone needs it let me know and I will.