You say you have respect for her, but at the same time you're insisting on ignoring her voicemail just to "play games" (which no matter how much you sugarcoat it is what you're doing)

If she's anything like some of the girls I know, don't be surprised if she ends up bailing for being messed about and you don't get d2.

Why is it you think that dropping her a text right now simply saying "hey, looking forward to tomorrow - still on for x o'clock?" is a bad thing? Why do you think waiting is a good idea.

I'd be pissed if someone was making me wait to confirm plans because I might be getting other offers to do stuff. I can't see what's to be gained by messing her about