Blindstich, I'm confused.
They asked the other two hunters about how many deer were shot and then they collected the 11 carcasses and were on their way.
Was there a violation? Was it the game wardens who took the deer? I couldn't get a clear picture from your description.
2 archery, 2 gunshot, limit. 4 deer x 3 hunters =12 you had 11, what was the violation? Were all shot with guns? its not clear. Sorry.
As to hunting on "your own land" it varies a lot, and what used to be the rules are now different in many places.
Where I grew up, when I grew up, you could hunt small game on your own property without having to buy a hunting license. You still had to obey all season rules and bag limits, but you didn't have to buy a small game license.
You had to get the tag for deer, though.
Been 50+ years since then, and I haven't been there in decades, but I think it has changed so you need a license for everything, everywhere. It was NY state.
Check your local (state) game laws and criminal code carefully. Especially the game laws. They get changed in degrees and often.