I agree with leaving a note but to include the above is only asking for trouble. Don't be so blunt. Leave a note saying that this is private property and the person may finish hunting the day but to take the stand with themwhen they leave at the end of the day. If it becomes necessary to trail a wounded deer, call for permission first.
Remember the shoe may be on the other foot and you may have to trail a deer onto their property, so don't burn your bridges.