we've been up there the last 2 years. the first thing that comes to mind is why would you worry about finding access to private land when there is soooooo much public land?
the same old adage applies...get a mile from a road and you eliminate 90% of the hunters. we haven't had any issues with other hunters as of yet, and we have hunted 9 days total this past year and the year before. don't worry about getting on private...look at colville national forest and you'll find plenty of access and plenty of turkeys.
use your drive over there to scout the land for turkey sign and find a place to camp and stuff.
my .02 for what it's worth.