Haven't dropped down on my knees or crawled up under our "new to us" MH but wondering where and how easy it is to locate the inside tires (tag axle) valve stems? No humorous remarks please.
For the inside dually, you need a long air chuck if there's no extender. Use a marker or something to mark on the wheel which hole the inner valve stem is so you don't have to search for it each time...
I use something like this:
well never mind the picture, apparently you can't attach images... just google dually air chuck.