Hi there,
Wish I could be of more help: All I did was email the ORTPN with some questions, and they responded and let me know there was availability on the day that I had inquired about, and instructions on how to do the bank wire. I emailed some follow up questions, that I hoped to have answered before sending money, and haven't heard back. I've tried to call their numbers and they wouldn't go through, and sent a follow up email with no response, so right now I'm a bit stuck. I'll be in Kigali the day before my intended trek, so if I don't hear from them by the time I head out for Rwanda, I'll sort things out in person. Sorry I couldn't be of more help!
Peace!