I bought the mud flaps from Ford, went to the dealer and ordered them. I looked up all the accessories I wanted on fordaccessoriesstore.com, grabbed the product #'s and said "these are what I want". Came in a couple days later.
The bug shield wasn't too difficult to install, the instructions were terrible but if you've ever installed one before you can figure out where everything goes easy enough.. just make sure you measure 5 times and drill holes once!
I'm in a bad area for road salt too, but as for drilling holes to put the mud flaps on you drill into plastic... so rusting wouldn't be an issue, and the screw/clips you put into the holes you drill are plastic as well. The only place I had to drill into metal was the hood for the bug shield.
All in all my sales person gave me the "family discount" on the accessories (minus the hitch) which translates to 15% off. Fine by me. I needed the hitch for my bike rack as opposed to towing.
The hitch was rather easy as the 4 holes were already made the chassis. Once I fished the bolts in the install was rather easy. The mud flaps were a breeze as well. a few holes drilled and they were on. I love the rubber mats compared to the stockers and they will handle the mud and snow of the winter months. The only thing I am not overly excited about is the roll-up rear canvas cover. It doesn't quit cover the entire back area. There is like a 2 inch gap where it ends and where the tailgate is. Not a big deal but I thought it would have benn a better fitting part. I wish I had the cargo "wet Trunk" underneath. I could have like to store a couple things in there.