I lend my stick out to other people sometimes, but I always keep an eye on it. I haven't really seen anything stolen, but I only went to one really big tournament (SvB last year), the others were much smaller (20 to 40 people).
Anyways, if you are going to SvB, I'm going too, so we can meet up if you want. I also play Rachel btw. Last year I think only 2 Rachel players were there (me included), so I welcome any new ones =).
Don't worry about not knowing anyone in real life before going. Last time, I went all by myself all the way from Belgium and I met up with some great people from UK, France and Greece. You'll get to know new people pretty easily (if you don't act like a prick ).