Screw the gators it's the moccasins I hate.

There are tons of rides like those you posted. When Jeanne and I were training for CFITT last year we rode all kinds of levees and places most MTB riders don't know exists.

Not sure how well the 38's will do for you, but it's worth a shot. Bring a bunch of tubes on account of sand spurs.

We suffer with the added weight and run Slime Tubes in our 29r Fandango hardtail.

FWIW, to get the total experience, try it at night.

PK