Switchback,
What state you live in? Do you hunt in snow storms or need a 4x4? Also how big is the boat you will be pulling? ( this will depend on v6 vs v8 ). I have an 03 F150 Fx4 for hunting fishing, and weekend driving trips that I just made my last payment on yesterday!!!! It sounds like you could be fine with a used ranger. The difference in mpg in an 8 vs 6 is not that noticeable.

Jim