Since you insist on dragging this out,
there would be no tiers if there is no differentiation: If you dont differentiate one group from another, there are no tiers. All club members can use all club fields in a safe manner. The 50% yak can fly all over the place at the large field, or fly within the size of a small field... aka Hover/3D. If heli guys want to buzz around the large pattern there is a large field or if they want to work on trims there is a small field.

Why you continue to try to institute a Tier concept where I observe there doesnt need to be one
is beyond me.
One club with 2 fields for the club members. No tiers, just dont fly unsafe for the size of the field you are at