Leave a note on the stand stating that it must be removed. If it is still there on your next visit, take it.
Since your land is far from your place, give the benefit of the doubt to the hunter, but assert yourself.
One of the downsides of owning land is this type of thing. I am always polite but firm when I confront trespassers. If I get any guff, politeness goes down, firmness goes up.
Bring a camera, GPS and a witness. Take names. Unless you are hunting, leave the firearms at home.
Post NO TRESPASSING signs on your property, even though the onus is on the hunter to know he needs permission from the landowner.