Ensure all people knows it's cash only or make other payment methods option in the rare circumstances...

Hi, for an elderly couple with grandchildren a very frustrated experience was had. All we wanted was to take our kids to the waterfall and a huge sign board is there like 10kms before the place stating that they are open. The car has to drive on this gravel or mudding road to enjoy a blessed waterfall experience. The problem is on the advertising board, do add CASH ONLY. We drove all the way for nothing as we did not have cash on us and no options given to withdraw money or EFT, strictly cash and this is not greatly advertised so left there extremely disappointed and had to clean up a vehicle that took a dirt ride in vain. 13km dusty drive...