Not sure if I did the right thing....thinking I probably didn't

So a friend of mine calls me tonite.

Friend: Could I ask a small favor of you?
Me: Sure.
Friend: Could I park in your driveway for awhile?
Me: What do you mean?
Friend: You know..."park."

Considering that I'd already said "sure," I wasn't sure what to say here.

Me: This feels kinda weird...
Friend: We thought about going to the lake, but I don't know how safe it is at night.
Me: Hmmm

Now I realize I'm deep into the shit cause I don't know how to say no.

Friend: It won't be for long.
Me: Have you considered the other lake?
Friend: Yes, but I don't know how to get to that spot at night.
Me (waiting for this insane conversation to end): It feels weird to me, but it's up to you.
Friend: Thanks.

Maybe a half hour later, Friend shows up at the door and asks to use the bathroom. Friend also gives me some popcorn. Consolation gift, I suppose. Back to the game.

An hour later, the doorbell rings. Friend uses the bathroom again. Goes back outside. Repeat again in an hour.

Three hours later, I get a call saying they're leaving and thanks for the hospitaility, and I realize my driveway has now had more action this year than my bed.

This sucks.