If you are or plan on being a regular visitor to High Trek Adventures, a punch card is the way to go. Unlike Voucher Packs, Punch Cards do not need to be used all in one visit. You can use it for each visit or for multiple individuals. Best of all, Punch Cards never expire, wheras Vouchers expire at the end of the calendar year.
Currently, Puch Cards are only available for purchase over the phone or in the store.