Sailing Expedition on Bala Lake for Two - Key InfoVoucher Validation Your voucher is valid until 01 Jul 20 You must validate book and use your voucher within the voucher expiry date.Duration: This experience will last approximately 2 hours.Group Size: There will be a maximum of 6 people on the boat.Weather Dependent: YesSpectators: Unfortunately you cannot take spectators to watch.There is no minimum age.Availability: This experience is available Monday to Sunday from May to October.