i don't trim, i dust maybe about 1/8" off every 6-8 weeks.
occasionally i may do the search & destroy method. I'll more likely do that on my uneven sections. Its hard to completely avoid splits 100%...eventually u'll get them, but i try to focus more on lowering the rate in which i get them.
Baggying has helped me dramatically!
. Pre-Lchf I used to need up to 1/2"+ trimmed off everytime i went for my touchup...now all i need is 1/8" if that.