Tourneys
Generally, I think tournamnets can be a great way to build/grow a bankroll. They usually require little if any entry fee, if given any time at all to preperation and study you are a better player going in than at least half the field, and some of the payoffs can be substantial.
If you are a 'grizzled veteran', already have a decent BR, can make better use of your time, wish to keep your identity private .. then maybe not so much.
Look at the tournament you are comtemplating. If you could place in the money four out of ten times .. would it be worth it? I think that is easily doable.
BTW, personally I think the idea that playing in a tournament automatically 'outs' you to the pit is a little too paranoid. Many times the people winning the local BJ tourney is some mom or pop who got lucky. If they don't know you previously at the tourney stop you should be able to come off just like that -lucky.
One last thing -this may be a little bizzare, but so what -I was watching the WSOP (1st prize $7.5 million, are you kidding me!) and heard someone say something like 'this is the modern day gold-rush.'
I think they are right and, I think it applies to BJ tournaments today. Some of these local tournaments have prize pools of a couple hundred thousand dollars being paid out over just seven or fourteen places. There is one I'm aware of in 2006 where first prize is $400,000, and it is no where NEAR the Hilton.
An advantage player goes where the advantage is. It used to be straight SD BJ in Vegas. Recently, bonus hustling the 'net was big. I think now, right now, BJ tournaments have a big positive EV for good players.
I'd 'out' myself for $400,000.

Good luck.