Quite often I give bus tours of Detroit. Last summer I asked a state person person on Belle Isle about the cost of bring a bus to tour the island. I was told there was no charge. Last Saturday, I led a bus tour and stopped at the toll booth. I was told the charge for a bus tour was $16. I chatted for some time, gave the toll taker $21 and expected to get $5 in return. I continued to chat and she returned the $21. Does anyone know if there is a charge to take a tour bus onto the island? Is there anyway I can use my personal recreational pass when I am leading a bus tour? Thank you