Multiple questions

#3 - I also have the Lippert 6-point level system. I carry 2 sets of Lynx pads plus one other set that has a larger footprint. Plastic is lighter, stores easier (in it's zippered bag) and is easier to keep clean. Wood absorbs water - plastic does not.

I use the large footprint pads whenever I have to set up on grass/dirt to spread the weight better. You can then stack the smaller Lynx pads on top of them if needed.

#1 - I guess it depends on how many windows your new 5th wheel has. Having owned both types, I'd never be without double pane windows if you're going to be camping in colder or hotter climates. They also offer substantial sound deadening benefits.

#2 - Since you have a short bed truck, be sure you don't need a sliding hitch with the new 5th wheel before you change hitches. I use a B&W RVK3600 for my Ram that fits in the factory pucks, but with a long bed truck I don't need a slider.

#3 - I use Lynx Levelers. I carry 2 bags of them. If the site is fairly level, I'll use 2 levelers under each pad. If not, I'll move some from the high side to the low side and/or use more.

Rusty

#1 I guess about twice as much as single pane! Ha ha ha