I usually meet up with Upstop and hit the park. But I have went to KI several times alone. In fact going to the park alone is how I met Upstop. Most of my friends did not eat, sleep, and breathe amusement parks like I do so I would go alone.
I sometimes find going to amusement parks by myself a great way for "me" time. I have met some great people along the way by going alone. Heck if you see a guy in line by himself it may be me!