Just so you know macaws are usually the best candidates for free flight, they are loud, large, powerful fliers, and usually colorful. A loud and colorful bird is much easier to find than a small moderately loud bird. Caiques are small birds that all but the tiniest raptor(American kestral) will target as prey.
Give free flight a lot of thought, it is dangerous and at anytime you could loose your friend forever. A friend if mine flew his African raven nearly every day for 3 years when his bird was chased off by a huge flock of wild ravens. Then he just recently lost his Lanner falcon, his Lanner flies very quickly above the ground and was hit by a car when flying a half mile away.
Do a lot of training indoors, and for your first out door flight make sure to go somewhere deserted and with little hawks. The Moab desert is a very popular free flight area and people drive thousands of miles just for that.
I believe recalling is a very useful thing to teach your bird, and flying in a secure environment in wind to experiance it is also good. Better to experiance wind securely than the first time they get lost.