wrote

Using AM say near the top of 6M as a local window to
avoid DX is unlikely to harm anything esp if they stay off
the repeater pairs

IIRC there are some simplex frequencies scattered between 53.0 and the top of
the band. Any of them ought to be OK to use regardless of mode, without any
blessing from anyone. I suggested the lower segment because of the wide-open
nature down there, without the possibility of being clobbered (or clobbering)
nearby WBFM repeaters.

Beep beep
de Hans, K0HB