Your summer season on the Yucantan's W coast could of course be absent a single
storm, but I don't think your logic is sound. I notice the Yucatan
landmass measures 170NM W-E at the latitude of Campeche while storm systems are much larger than that; the Yucatan landmass may reduce a storm's strength a bit but it would hardly be a source of protection. You might want to spend some time researching storm tracks (and the details of the respective storms) to test your theory. As I recall
, one of the hurricanes that killed the most people in the USA, Allen in 1980, swept right past the N tip of the Yucatan Since such storms are steered by the large continental land masses' pressure gradients and the jet stream, I would think it's unrealistic to expect that local geographic features are going to noticeably influence these storms.
I also remember reading on the NHC site that the Mayans provide the first recorded history
of hurricanes...and they lived predominantly inland.
Good luck with the new boat, and also your storm planning.