Taj 1/2 NL first time, short buy-in?

[Marc Desjardins]

I'm going to AC this weekend and I'm tempted to try my hand at NL. Last time I went I only played 3/6, but from what I saw and what I read, the NL games seemed pretty juicy, but with the big preflop raises, it seemed like it has very high variance.

So, with a 300$ max buy-in, how much should I buy-in for? The whole thing? 200? 100? My bankroll is not that big, losing 300 in one hand would hurt, but then again, doubling up with only 100 in front of me if I catch a monster seems like a waste?

BTW, I have about 13k hands logged of NL25 online with a 8.83BB/100, I just recently moved up to NL50 and I've been doing almost as well so far with 7.45BB/100.

Any advice for a B&M newbie will be much appreciated.