Well this has been a great thread and I am pleased if my posts have saved a few people some grief down the road (pun intended). The only thing I ever regretted adding because of the expense to usefulness ratio were the air bags. I did those first on someone's recommendation, but definitely the most valuable thing I did was adding the extra rear leaf springs, boosting it to the equivalent of a 350. These are NOT the same as overload springs. You won't get the same stability with those especially on rough roads where the bouncing takes the weight off the springs at times. The extra leaf adds a rock solid feel that is consistent under all conditions. The downside is that the ride is a lot stiffer than normal when you take the TC off and are just driving the bare truck around. Speed bumps will rattle your teeth. But when the truck is fully loaded, well the difference is measured in light years. And truthfully I scarcely use the air bags any more. Since I paid a grand for them with on board compressor, I feel compelled to use them a little, and you don't wanna ride around with them on empty, but in hindsight, had I done the rear leafs and other upgrades first I would NOT have spent the dough on the air bags.
But each of the other upgrades clearly enhanced my roadability, and I would NEVER drive around on tires where my load exceeds the specified range. As others have pointed out, your tires' reliability decreases substantially with age... and especially if the vehicle sits much of the time. Goodyear specifically states you should never let any tires sit in one spot for more than 90 days without moving... I take them at their word. And I thought the one recommendation to steer clear of utility trailers was a good one... I am personally expanding that to steer clear of ALL trailers, RV, boat, horse and utility... anything that might be sitting around a lot of the time, and ESPECIALLY all single axle trailers. Tandem axles give you a major margin of safety, but single axle trailers have none.
I learned my lesson. Check this photo:http://www.LasBrisas...os/shredded.jpg
That was a boat trailer tire on my sailboat that was only 2-3 years old which I was towing behind my TC! And it was a single axle trailer! Scared the S**T out of me. No accidents, and I had a spare, so I upgraded my tires at the next town. But after that incident, I upgraded my boat trailer to a tandem axle setup, and when I realized how overloaded my E-range tires were, I immediately began investigation on a heavier duty set which led me to the michelin 19.5's with the 110 lb inflation pressure. I haven't detected too much difference in speedo calibration over the old monster 18's by the way. still within a few mph at 60.
By the way, we have moved up to a new RV:http://www.TheAnneMarie.com/windseeker
A unique setup that allows us to live in the luxury of a 40' motorhome (actually the equivalent of a 50 footer as you will see) yet allows us to tow our boat PLUS bring along a fun little car to drive and to launch and pull the boat out with. Check it out!
Since this is our new rig, we're now selling the truck camper. We'd like to sell it as a package but will consider offers for the two separate pieces. See our web page on the TC for more info:http://www.LasBrisasTexas.com/F250