Jeeps make all kinds of noises, just do a you tube search for engine noises.
Piston slap, exhaust leaks, lifter noises, and so on.
As for DW, you'll know it when it happens. It will pucker you right up. Usually occurs if you hit a bump, or a dip in the road a certain way. Yours sounds more like a tire balance or tire problems.
Do a search on brake pads, there are a few out there that folks swear by.
Drums aren't bad, especially if you have the spring tools. Have to watch, some had the old mopar style lining. Instead of a full lining on the shoes, they have 2, with a space between em. If the lining is worn out, it can groove the drums to the point that the only way to remove the drum is to back off the adjuster all the way.
And if you are doing it yourself, do one side at a time, that way you can peek at the other side when reassembling, to confirm how it goes back together.