I have my own barn and don't have boarders, so it's a little different. I got lucky a few years ago at an auction and picked up the tall school type lockers. I got a section of 10 for $19! Each horse has a locker, bridles, individual supplements, medical stuff, etc. My saddles & all show tack get locked in the tack room and we have a very big dog that sleeps in the barn at night. I can relate Faye, we had our barn cleaned out in 96' they even went in stalls and took halters off the horses heads. Thank goodness for insurance!
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.