TourWP High/Low season price for tours

Hi there, as I asked on themeforest, I use group discounts to set prices in relation to the number of people (1-2 pax €xxx / 3-4 pax €yyy and so on).. how can I manage this system with the High/Low season variable? Being one day tours, with this system I should disable the departure date. How could I do? Can you help me? Thank you very much for your attention and kind support..