I wouldn't imagine that you would have any trouble with this, unless it was on an AI section of Bloody Bay, in which case the staff may wonder what you are doing. Another option might be to hire a boat (like Famous Vincent) to take you out into sea and scatter the ashes. Of course this is a very personal decision, but going out in a boat might allow you some private time to reflect and memorialize your husband how you see fit. I'm sure Vincent and staff would be very respectful of this request.