6ptsika, you know as well as I do that a 300 to 400 pound bear does not come easy. A hunter really has to sit super still, control scent and make very little noise, then pass up all the little guys to boot. The problem most hunters have is they loose confidence with their spot and start to move around a lot trying to get a glimpse of movement while on stand. Bear have limited eyesight, but any movement can spook them off a bait in a heartbeat. I rely mostly on sounds they make before coming to the bait. They are very vocal animals, but you have to know the sounds and then you can focus on being statue still until they appear. I had a stand a few years back that had a big bear coming to it, but he would not show until after dark, so I set up some trail timers 100 yards back from the bait and found that he was coming in and laying down just within site of the bait until dark. This is a good time to set up a pop up blind or climber on the outskirts and whack him when he least expects it, so I did and he walked past the climber at 10 yards after 6 other bear had passed me by and headed into the bait. His body was as big as a 55 gallon drum and I had him dead to rights until he spotted me moving to take the shot and turned to leave quickly. I fired one shot at his spine and missed him clean. I have not seen him again, but have seen what I believe to be his track in the area. I tried to get him with hounds, but he would not tree after a 7 hour jaunt, so he is safe again until next year. I have seen a lot of 400 lb. bear and this guy made them look small.
I know that most guides give a cookie cutter style hunt where they hunt you on the same bait over and over and never change the routine much, but with a little extra effort, those big bear are possible to kill every year. The problem with a lot of guides is they have too many hunters and cant spend the extra time with an individual hunter, that is why hunters need to find a hungry guide with a small amount of hunters and the success can be very rewarding.
We do have plenty of big bear here in Maine, you just need to find the right area to hunt and the right people to hunt with.