For shredded, I’d look at pork shoulders/butts. They are a lot more forgiving to cook, and easier for that many people. You could do them well in advance, freeze, and they re-heat well.
I believe I read somewhere that pork loin meat (not fat and meat) is leaner than chicken breast (not skin and chicken breast)!
With the pork loin being that lean and wanting to dry out very easily (due to no fat) I think you would get a very very poor shredded/pulled pork type of consistency from it if you could get it at all.
The idea behind shredded/pulled meat items is that they get tender and fall apart when they are over 190F and the collagen starts to break down. Your pork butt, brisket, chucks, etc. have plenty of fat and collagen in them to break down and get tender and juicy to be able to be pulled when they hit an Internal Temp (IT) of like 205F+
I don't believe your pork loin is built the same way as those other cuts due to it's leanness.
Of course you can shred anything, but shredded vs shredded and good are two different things :)
Unless my understanding is waaaaay off, I think you will have a very hard time trying to get a GOOD shredded pork loin product due to the way that it is built and the way that it behaves.
Now there is absolutely nothing wrong smoking the pork loin and hand slicing thin. Pork loin is very often served hand sliced with sauces, gravy, fruit chutney, etc. etc. People can shred their slices apart on their plate as they see fit, plus pork loin is so tender you can simply cut it with a fork, if not overcooked and made tough :)
I hope this info helps :)