If you're getting mudflaps for the pickup -- consider getting BIG ones and cutting them down to what you need. I use flaps built for full size semi tires. The flaps are about 36" tall x 24" wide. I cut them to about 10" wide and to length so they clear the ground by only three or so inches (when the pickup is loaded and with the trailer on it). I mount them way up into the fender so that they help repel crud that would otherwise get throw way up there, too. The 36" is more than I need -- but not too much more. Installed length is about 28". And I buy flaps (I get 'em at either NAPA or CarQuest) that have the anti-spray "nubbies" on the tire side. They do a good job of reducing the spray that is flung off the tires and ends up both getting extra dirt on the side of your vehicle - and messing up the vision of the vehicles beside or behind you.
Use stainless fasteners - and expect them to last for at least a year before they corrode. I mount my flaps at three or four points depending on access behind the fenders.
I usually use some really high end black paint -- 99 cents/can at discount stores is about as high a price as I can afford) to paint over the advertising that's otherwise showing on 'em. But covering that would be your choice.
The only drawback I've run across is that when backing over a barrier - such as a curb or log - the flap hangs down far enough that it gets caught between the barrier and the tire and gets ripped off. I do that about once a year. . .