I agree with GLC. Get an F350 single rear wheel and never look back.
Payload, payload, payload. That's the issue with RVing and half ton trucks. Remember that the tow rating for every vehicle is for all types of trailers. Towing a 10k pound boat is significantly easier on a tow vehicle than a 10k pound RV, be it travel trailer or 5th wheel. You can ignore that tow rating for a 5th wheel. This is how the math works based on estimates of fictitious dry weights:
Pin weight: 2135
5th wheel receiver : 250 pounds
You - driver: xxx pounds
Spouse - passenger - yyy pounds
This is over 2500 pounds before loading anything in the large basement storage of the RV, anything in the bed of the truck around the receiver (firewood for example). This does not include anything else you want to carry inside the cab, pillows, blankets, emergency supplies, kids, etc.
All the pin weight must be supported by the truck's suspension. 2500 pounds is rare for even a stripper 2WD extended cab F-150 with the 8200 pound GVWR package. You can probably make it work with a regular cab truck and the 8200 pounds GVWR, but you run into another problem. Every pickup that carries enough weight ti put it at GVWR with just weight in the bed is sagging a lot. You'll want some kind of suspension help, like air bags, helper springs, Timbrens, etc. Now the 8200 pound GVWR F-150 has similar payload as the F-250, in the 2000-3000 pound range. Diesels generally are lower. This is why I say F-350 with actual real world payload of 3500-4000 pounds. Plenty for a loaded 5th wheel RV, people, and gear. The cost difference between a similarly equipped 3/4 ton and 1-ton single rear wheel is about $600. The unloaded rides are generally the same as most trucks have overload springs for the 1-ton which do not come in contact unless at least 1500 pounds on the rear. Take a look at the Yellow Tire and Loading sticker on every vehicle 2006+. When you find truck with at least 3000 pounds listed, add it to your potential list.
So while I love the F-150 EB, recommend it for up to its tow rating, and would love to own one (pretty please put it in an HD Expy), the F-150 still does not make sense for many in the RV world, especially 5th wheel owners.
Last edited by APT; 09-27-2011 at 02:11 PM.