Replying to Backyard setup help anyone?

So here in north jersey we just got about 6 inches and its still going strong. I went out to go make a setup and i think the snow is too powdery if possible. I mean i see in videos and other things that the ride on is nice and packed tightly so i was just wondering if i did something wrong. I kept filling up a garbage can of snow and made a huge tight mound then just shaped it out to the way i liked. The pvc fell out of the setup after a few runs so if anyone knows any tricks to making it better i need some help. Thanks