G'day Java,
I know that last dry season, King Leopold Air had a C172RG based out of Cape Leveque and a C210 in Derby, in addition to their main base in Broome. I'm pretty sure it's the case again this year, although the Broome boys that frequent this forum will be able to help you out a bit more.
Broome Aviation/Northwest Regional using C210s also operate through YCLQ from their Broome base for a lunch or afternoon/morning tea stop as part of their packaged day tours, but I'm pretty sure they don't have an aircraft based there as such.
Golden Eagle in Derby also operate flights out to the Buchaneer Archipelago/Cape Leveque using a couple of C206s. Not sure if they stop at YCLQ as well, but I imagine so.
Cheers,
TL