... Especially specific how better mantain the advance level of a certain trail that only gets volunteers that ride lesser skill trail.
This has been an issue for as long as I can remember. Advanced riders and racers do not give back to the trail systems that they so enjoy, at times on an everyday basis. Sure, in the past one or two days I have seen SOME help, but that's it. It has become the norm that we can no longer ask people to build and repair trails they themselves won't ride. It is too labor intensive, and people ride sensitive closed trails before the volunteers can get in there and fix them, which makes for an even more labor intensive workday.
If the cost of parking ($2 - $4) or a yearly membership of $20 is worthy of enjoying collectively over 125 miles of trails maintained by a small percentage of volunteers - then you get what is available with the resources at hand.
For many people letting a small group of volunteers blaze the trail before them is sufficient. For those who advocate great trail opportunities and are willing to put in the sweat equity that it takes to make it so - they go out and actually do it.
So, as in everything in life - you get what you put into it.