I have not personally owned a Durango, but there have been more than half a dozen go through my family and I helped work on at least half of them. (1st and 2nd gen, only. No 3rd gens.)
Round about 2010-2011, there were 5 of them in the family, at the same time.
Lots of electrical issues. Many transmissions. Several transfer cases.
Not one of the owners would buy a Durango again, and no one has. The last survivor lived quite some time, a 1st gen ('99) that was finally fatally wrecked* by my niece in 2016. *(Fatal to the Durango, not my niece.) But it was on its second engine, third -and failing- transmission, second transfer case, second rear axle, and the interior was absolutely falling apart.
So.... Par for the course for Second-Malaise-Era Chryslers?
Owners of 1st gen Durangos had to install air shocks or beefier leaf springs for towing much more than a pop-up trailer. The rear ends just bottom out like the factory springs are made of paper. ...Like 20th Century Suburbans, Blazers, and Broncos.
If you're looking for a 3rd gen Durango, then none of what I've seen is applicable. I have no opinion or experience with them.
But if you're thinking about a 1st or 2nd gen, I think you'd be better served by spending your money on a Land Cruiser or equivalent Lexus (LX/GX series, preferably the LX or GX 470) from the same time period. Probably the best SUVs built during that time, and they're still damned reliable and capable today.
(The Lexus is usually cheaper.)