hey
cas is sick and you should definitley check it out
freestyle nights are every thursday and friday, thursdays are usually quieter and fridays have a rookie park on the nursery slope but is generally busier. sessions between 7-11pm (28 quid for 4 hours i think)
the last friday of every month is aprkstrife which is where the park is stepped up to advanced features, more coaching, better vibe. this is from 7pm - midnight (35 for all night i think)
nice little crew of skiers there and all abilities ride so dont feel like it's elitist, just rock up and ride
hope that helped