From what I have been able to determine, the local opposition actually outweighed support. Yet the Feds and Provincial governments, backed by the local FN's (realizing a Private Hunting Reserve after all) pushed it through anyway.
Nog
Just the opposite, which surprised me. We live up here now and attended the public consultations and opposition was underwhelming (except for a few disrespectful "no" protestors that didn't help their cause). Even looking at the results of the non-random online survey, which is usually swamped by opposition forces rallying to the cause, of the only 41% that voiced any concerns about a park, restricted use/access and hunting/fishing were only raised by 14% and 8% respectively. We're clearly a small and shrinking part of the outdoors community up here. Even the ranchers seemed somewhat placated by assurances their crown grazing rights are safe. I suspect some are looking at Parks Canada's land buyout as a long-term option.
I think if the park proposal had been raised before 1990 when the demographics of the south Okanagan began to rapidly change, it would have been a non starter. I've had a hard time finding another fisherman amongst the hoards of us wine-swilling retirees.