I firmly believe that the trap bar is the best way to build full body strength and it is much more joint friendly than conventional squat/deadlift. I've been preaching it for years but it usually is disregarded I feel. The best part is that you can adjust your foot position and whether you hinge or squat at the hips. It's also great for farmer's carries. The more appropriate hand positioning is better for the development of your upper back muscles, reduced risk of bicep damage, and the weight moves inline with your joint stacking, as opposed to pulling it in front of your legs or having a bar on your back. The compromise is that you lose some posterior chain activation to a more quadricep dominant lift but you can get that back with rdl's or glute-ham raises.
My standard trap bar workout is to work up to 5ish heavy sets of about 5 reps each. Then, drop the weight and do a few high rep sets of straight leg style deadlifts with a slight bend to the knee ("soft" knees). After that, I pull bent rows from the floor- when the bar hits your ass, lower it back down.
I typically use 35lb plates to simulate a squat type lift or deficit deadlift (depending on how I choose to position myself). For my rows, I often use 25lb plates to increase range of motion.
That's my basic caffeinated trap bar spiel. If you have any questions or thoughts I would be happy to clarify my points. I'm not a certified trainer or the like, just a guy who's spent a lot of hours picking heavy shit up.
When I was at my peak strength, I would often pull 100 reps at 200+ and one evening I hit 40 at 400+. I've slipped some since then but am working back it. Using the trap bar as my primary implement, I built a conventional deadlift of 500+ and conventional squat of multiple reps at 400. My goals have shifted and I'll probably never do that again, but for a guy weighing 185lb it felt pretty damn good.