I would use what you have...I have both gravity and broadcast feeders..
For some reason one of the farms I hunt the deer don't like the broadcast feeders...I tried them for 4-5 years, and seldom had a picture of a deer during the day...I wouldn't worry about the coons, they are going to eat corn, no matter how you put it out...I have pictures of coons and deer eating together under a spin feeder...A couple of years ago I caught 10-12 coons during the summer, under my spin feeder...

I would suggest...buy an over the shoulder type seeder...one with a zipper...mine holds about 20 pounds of corn...fill up your pipe feeder and spread the rest in the area with the seeder...then about once a week go in and do the same...Start doing this now and the deer will actually get used to you going in and doing this...I had a buddy that uses his 4-wheeler with a spreader to feed in his back field...A couple of years ago he took his grandson on the 4-wheeler and put him up in the box stand to hunt...He went back to the house on the 4 wheeler and was going inside when her heard 2 shots...Went back and found his grandson had killed 2 bucks...They had gotten used to hearing that 4-wheeler bringing corn to them...

I do like spin feeders because you can fill them up and they will feed every day for about a month or so...But gravity feeders also have their place...Another farm that we hunt we have problems with thieves taking our stands, etc...I use pipe feeders there as well...Because they are cheap to make...