As noted above, Cibola will work fine over dry sand. Over the wet salt sand the best I've gotten with a Cibola on coins is about 3 inches (at best) by playing with disc and sensitivity.
The T2 may be what you want to take. It will ground balance to the wet salt. I've got an F75-LTD and have gotten very good depth over the wet salt beach by running all metal mode and staying on top of the ground balance. Over the wet salt, if T2 tracks the ground balance settings of the F75, it will take a setting in the single digits to ground balance. Single clicks on the ground balance can make a difference, let alone full number changes.
You could take both detectors and play around with settings.