Although I understand that you are fighting for a cause that is beneficial for these animals, zoos and circuses have been traditional across the world for decades and even centuries. Traditions, yes, do change, but old habits die hard and I do not believe that this will be an easy task to accomplish. I am as much of an animal lover as the next, but I know that it will be easier for me to go to a zoo to see exotic animals than it would be for me to find a 'local' sanctuary or safari to go on.
Based upon everything presented on this site, I cannot find much of an argument against what your organization is attempting to start. We often forget that we are part of the animal kingdom and although we may be superior to these types of animals, we still are in the same exact cycle they are in. We should treat them with as much respect and dignity that we ask each other for. I am a full supporter for your notion and I intend to contribute what I can to a cause such as this.