I've never had any issues parking in the main parking lot, but then again I'm never there until dark. If I go ride there I usually get there around 1 and ride for 2 hours or so. It's usually whenever I feel like riding, and when the weather is nice. Its easy for me since I only live 20 minutes away. I Don't have a specific biking day though, its just whenever haha. Haven't tried those other places you mentioned.