I use Lee soft grad 0.6 because I have trees on rolling hills as skyline where I live. My guess is that you will need a hard grad, because you will likely be shooting a straight horizon (sea) in Bermuda. Reverse grad (slightly hard grad at the bottom gradient, very soft grad at the top gradient - I have Hitech 0.9) is useful for sunrise / sunset with relatively flat horizons (all those corn fields for me, Bermuda sea for you). I have no experience with the Lee hard grad. 135 format camera (Canon 6D, hence old-fashioned taming of DR), use 21mm and 35mm lenses most often, occasionally 50mm.