We have 9 hours in port with a 9am arrival. My experience is they are there bright and early. Allowing for 2 hours (ferry/cab or bus) each way), 1.5 hours looking at ruins. Leaves 3.5 hours in the sun at some beach.

I'm reading the beaches at Tulum are very nice as well.

Should we just camp out at Tulum? Is it walkable between the ruins or do you nee a cab?

Or should we head back to either a Cozumel Beach or a Playa Del Carmen beach.

Looking for your trusted TTOL experience/opinions.