Atlee wrote:
Re: #1) I don't ever plan on going to a scale and weighing each trailer tire in order to know how much air to put in it.
For a small popup or other very light trailer towed by a larger vehicle such as 1/2 ton or bigger truck I'd tend to agree it isn't necessary to weigh it.
Otherwise it is VERY useful to get your rig weighed at a CAT scale. Too many people underestimate the weight of their rig when fully loaded. They end up over the trailers tire and axle limit or over the GVWR of the tow vehicle.
The other useful thing to do is carry temp sensor. These are point and shoot devices. Simply aim at the tire immediately after stopping and get a temp reading. Quick way to tell if tires are running way too hot which happens when overloaded or under inflated.