Hi
I love an unqualified answer, always good for a giggle. Let's start again now I,ve stopped laughing.
I have to say it depends on the bike you choose, most road bikes today are infact to flimsy to be fully loaded and handle well and these same bikes tow poorly as well, now that is out of the way and you own a decent touring frame.
I tow a Bob Ibex, bike is equipped with a handlebar bag and a rear rack. Day trips are easy (unloaded) simply by removing the trailer and dry sack. Trailer also useful for shopping and basic chores.
Friends use panniers and take longer to pack/unpack, load/unload and there bikes seam to act like parachutes with their panniers hanging out all over them. They do have there advantages when travelling as they don't need to pack a trailer.
Both are good, try them and make up your own mind, it's the bike that matters most.
Cheers
John.
Ps Never had a trailer flat.