Hello Medium Pace,
I would suggest that you start them off with the "walk in" blinds and then progress to a small Jon Boat with an outboard to reach the other blinds for both puddle ducks and diver ducks (see note below).
Layout hunting for "divers" is more complicated and expensive as it normally includes the use of a "tender" boat. The use of a guide to try this type of hunting is well worth the expense.
Jerome Katchin, D.V.M.
Note: As diver ducks are hunted in more open water and often in potentially "bad" weather care must be taken when selecting a boat.