Probably hearing the same pyramid/skunk ape tales told by the Okeelanta Oracle that the Duke of Pahokee heard,Homer "Buz" Osbon and his intrepid team of L Frank Hudson and James Spink set out in 1971 to find these pyramids.
Hudson,a treasure hunter,was said to have helped Dr Manson Valentine recover a pirate chest in 1968,but never saw or knew what the contents were.
Osbon claims that they found two pyramids in the Big Cypress Swamp-"...the more complete of the pair is a 12 1/2 foot tall structure...the pyramid has a fantastic amount of writing on its surface in what I can describe as symbols or hieroglyphics...these structures were built by a civilization long gone from the face of this planet"
The also encountered the guardian skunk apes during this adventure:
Bigfoot:
L Frank Hudson,of Artifacts International,also compiled Florida skunk ape tales-"Hudson says commercial fishermen have seen them wading from island to island or swimming in the open Gulf of Mexico".
Bigfoot: older Florida reports the '70's
It should be noted that L Frank Hudson was charged and convicted of unauthorized excavations in his search for gold for damaging and destroying native American burial mounds at Big Mound Key,Gallagher Key,Ross Island,and Cockroach Island.
To the best of my knowledge,no photos of pyramids or skunk apes from Osbon's expedition where ever taken or produced.