Let the guide check out your outfit: Rod, reel, fly line, leader and let him pick a fly out of your boxes or let him give you a fly.
If you have fresh leader material and the guide ties it up you probably won't break off.
For these inshore small to medium size Tarpon we use 8 or 9 weight outfits with tropical floating lines.
Forget everything you think you know, have read or heard from friends.
Just listen to you guide.
Here is a fun video showing several breakoffs......?