The last thing you want to do is put those flexible extenders on your valve stems. They have a tendency to leak and if they get loose from the anchoring point they can flop around and not only do damage to your wheel but suddenly deflate the tire causing a catastrophic loss. I can speak from experience,this happened with my old Class A.
What is needed is a extended valve stem that will let you quickly check your tire pressure. They add no extra weight like the Extenders would and balancing is no problem, TPMS works on them as well
Something like the
Duallyvalve I have a set like them and I never have to take my simulators off to check the air pressure.