My earlier reply does not appear to have been posted so I’ll try again.
1. We learned that the fee is ‘voluntary’, whatever that means… (I doubt they will issues tax receipts for ‘donations’ made.)
2. You should refer to the BCMT map but some of the camping sites on that map are no longer ‘approved’ by the Ahousaht, but I don’t know what they wil say or do if they find you camping at one of those sites.
3. I’d suggest Nuchatlitz or Nootka Sd instead of Clayoquot. (Long approach paddle for the former.)