I don't know about bags (although all I have heard is good) but I do know about WD hitches. I would get the Equalizer brand. They are durable, simple, easy to hookup, include sway control, and you don't have to disconnect anything when you back up. I wouldn't mess with anything else, and I would hate to have to disconnect a sway bar before backing up. They are a bit more than the competition, but IMO it is totally worth it.
A WD hitch can transfer load to the front axle and the trailer axel, reducing bumper sag. This may reduce the need for bags. They are adjustable, and will make your bumper pull experience very enjoyable. Spend a bit of time messing with the setup to get it right and you will be a happy camper.
