Chinook,
What MMA did you pick? I've hunted Portland Creek Area 2 before, as has CV-32. Great area for moose, bears and coyote!
Your .30-06 is fine for bear. I'd go with 180gr bullet. My choice would be the Nosler Partition. It is considered a "premium" bullet, actually the benchmark to which all others are compared! You don't need the XP3...pick yourself up 2-3 boxes of the Federal load with the Nosler bullet and hit the range. Sight in your rifle for the actual load you'll be using in the field. Get the trigger time in shooting from field positions, including standing, sitting and using your pack or shooting sticks as a brace.
My preferred shot on our super-large Newfoundland Black Bears is the shoulder shot. I try to break both shoulders to immobilize the animal and prevent it from running away. By October, your bear will be nice and fat, as a consequence, if you go for a standard behind the shoulder shot and the bear takes off, you won't find much of a blood trail. The fat and thick hide tends to close up pretty quick behind the bullet and as a result, prevents blood from leaking out. I have absolutely NO interest in beating the brush for a potentially wounded and very pissed-off 500-600lb bear!
As for bait, the more you can get the better. I usually get a buddy to save the stale donuts from the local Tim Hortons for me. Old cooking fat/oil from the local fast food restaurant is great. I often buy a couple of sacks of cheap dog food as a bulk filler and liberally coat it with the lard/grease/fat. Molassess is also very good and even bread. I also take along a few pounds of honey to do "honey burns". The smell can travel for miles and will draw a bear to you. All you need is a small can, fill 1/3 to 1/2 with honey and put it on a small sterno fuel camp stove. As the honey cooks and starts to burn, the sweet smell is carried by the wind.
I usually try to set up several bait stations to increase my odds for success. Bring along a pick and shovel and several plastic buckets or barrels to put the bait in. I like to dig a hole, put the bucket in and then place 4'-5' sections of 8" diameter trees over the bait. Too heavy for foxes or coyotes to move, so if you come back the next day and the bait is gone and the tree sections moved you know you've got a bear hitting your bait station. Some guys do the same basic thing, only they put the bait in plastic shopping bags and hang it up in a tree high enough so that the bear can reach it by standing on its hind legs. Only thing with this method is I find the whiskey jacks will get into the bait.
My last piece of advice is to expect the unexpected! You'll be surprised at just how quiet these monsters can move. They can creep up on you without you ever knowing that they're there, so be quiet while on your stand and keep movement to a minimum. When walking to/from bait stations, camp, etc...keep your rifle ready. You might bounce a bear just walking or spot one out on the barrens/bog when you least expect it.
Good luck with the hunt! We're heading out to the Dashwoods in a few days!