Meeting people from the internet

[FivepointOH]

Have any of you ever met somone you talked to from the internet before? I've been talking to this girl online for a few months now. She claims to be 18 and has sent me at least 15 different pictures of "her". She is always really nice and I always tell her she should drive over and see me(She's 3 hours away). Anyway me and some friends are going to the lake for a few days for july 4th and I mentioned to her that she should come. To my surprised she said yes. Now i'm wondering all sorts of things like is that really her in the picture, maybe she's really a big perverted guy looking to do nasty things to me(I have talked to "her" on the phone before though and she sounds like a girl). Where should I meet up with her at? Also she told me she has to bring a friend too.... Any of you guys ever done something like this before?