RE: Help, did I do the right thing or not?
I don't see anything wrong with putting a stand there at all.
But it could become a problem, especially if the person who usually has a stand there still intends to and that person happens to be an a$$.
If you have any sort of relationship with the owner or other folks who hunt the land, you might want to have a chat with them and bring the subject up. Something like, "just wanted you to know I have/haven't seen any yet and by the way, there's this tree I've had my eye on........."