Replying to Strange early season vibe

I've been thinking about the last few years of skiing at my hill, and there's always a pattern.

Early season- Lots of different people that I've never seen before, park is completely packed, making new friends left and right.

Mid season- skiing is great, most of the park skiers disappear, vibes suck and it's mostly locals. More empty chairs and old people.

Late season- All of the early-season kids come out of nowhere and the hill is lit, good vibes, crowded as fuck again.

Do any of you experience something similar? It's like November and April are a whole different season. I get into way more conversations during the beginning of the season, and then its like people go into hibernation until the weather warms up. What gives?