It's only a big deal if you make it one.
That's my little catchphrase, I say it a lot. If it feels good, do it. Yeah, you might be doing it for the wrong reason but who cares? You're also doing it because you love sex. As for the whole gaming her online thing, I have my opinions on that but when you meet her just be friendly and give her a big hug, ask her about the trip etc and just have fun. If she really wants to fuck then it's up to you to make that happen, she's not gonna make the move on you so just sit down with her and put a DVD on or something then snuggle up to her or play with her hair, stroke her leg or whatever. She'll probably keep giving you little sideways glances, and from my experience this means 'kiss me'. It's all downhill from there.
