One enterprising resident has built a room for rent, for 60 pesos
This is very old information and I haven't had the opportunity to update, so you're on your own.
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Getting there.
There is now one daily water taxi service from Boca de Tomatlan
at 9am to Chimo, for 100 pesos each way. It gets to Chimo about 10am
and then picks up people for the return trip. If you come you'll have
to stay the night.