You take it to the garage because being a four wheel drive they have different hubs and they have to be taken apart in a certaing order and put back together the same way and if you get something wrong it will cost you a tone of money to fix it.
The Dodge Durango is equipped with a hub/ bearing assembly. Replacement requires removal of the break caliper and break rotor. The 4 Wheel Drive models will also require removal of the half shaft nut. There are 3 bolts that must be removed in order to free up the hub assembly.