I'm no pro-staffer, but I will give my 2 cents. Just remember that just because you aren't seeing multiple 3.5 year olds doesn't mean that they aren't there. Almost all the 3.5s that I had on camera this year I didn't see in person. I did end up seeing them quite often after season when they were bunched up, but that was with heavy snow and out in the fields. How many cameras do you have running? If you don't have several cams going I would definitely give it a try and get some inventory on the deer on your place. If you control that many acres you should definitely have some mature bucks on your place.
We had two or three last year and two we found out weren't working, this summer we are gonna put 5-7 out hopefully. I kinda think we have so many does and we previously only hunted the rut that the big bucks were locked on does the whole time Sent from my iPhone using Tapatalk