I wont say much in an open forum but i coon hunted with an old timer for a couple years about 4 years ago. He has since passed on but the time i spent with him was a blast and also frightening.
1. Get the notion of not trespassing out of your mind. Landowners hate coonhunters with a passion. Lots of it stems from the 80s when you could get $20+ per coon. It drug the lowest of low out to the woods. Fences, crops, signs, nothing stopped them from shining coons. Most didn't even have dogs, they just drove around shining the trees. As a result you will be hard pressed to find permission. Way harder even than deer hunting permission. So if you want to hunt I'll remind you what my buddy said one night when i asked "George who owns this place." Sign out by the road said George owns it tonight". He had a switch in the cab of the truck that would kill all the lights, tail lights, headlights, brake lights, license plate lights, dash lights. All of them.
2. Coon Dogs don't give a shit about property lines and no matter how hard you try there's no telling where they'll go. We ran one dog that would tree within 100 yards of the truck, but 1 out of 20 times he wpuld just haul ass or double back. I've pulled dogs out of a shed in a trailer park at 2 am. I've had them tree on a pastors tv antenna tower on his house, trees in people's front and back yards, even on some lady's porch once. In two years i had three guns in my face at 2am.
3. You might think you're going to slip out around 10pm for a couple casts and be home in a few hours. Then that dog gets a wild hair and hauls ass. Guess whose still driving around at 6am trying to find a dog. Even with a GPS collar on its no guarantee. You wont catch a dog that doesn't want caught.
4. There's a lot of counterfeits out there. (Dogs that look good on paper but aren't worth the paper they're written on) They may even look good when you give them a try with the guy selling them. Not every pup from a bad ass on paper dog will turn in to a bad ass dog. In other words if you don't have the heart to cull a dog and move on then you'll never have a good dog. Get it in your head now that you'll walk out of the woods with only your collars in your hand a couple times before you find a good one.
5. Get you some electrical tape to hogtie and muzzle them so you can sew them up . You will need to sew a dog up on the tailgate at 2am so get a suture kit and a big bottle of sheep penicillin from TSC. Fences, coons, and even coyotes tear some big gashes in them. If you don't have the heart to sew em up yourself your vet bills will be outrageous.
On a positive note. There's nothing like standing in a dark field and hearing a coon dog hook and tree. Then when you get in there and roll that big boar coon out still alive the fight is on son!