Below is a screen grab from the HS411 calendar (you can access it in the members section of the 411 website) and you can see touring options are racking up.
My suggestion: keep track of all the things you’re planning to attend in one place. It can take some planning/juggling as schools often host on the same night and that, along with school and extra curricular stuff and life in general can get complicated.
And again, take notes! Applications aren’t due until December and after you’ve seen a bunch of schools things can start to blend together in your memory.