It's an easy job. There are maybe 3 or 4 bolts along the top of the fender, one or two inside the door jam, and possibly a couple inside the wheelwell. It's been a few years since I did mine, but the hardest part was just getting it lined back up perfectly when putting it back together.
If you've got the same type of flares that I do, you'll need a fender with mounting holes along the edge of the wheelwell.
Before:
After: