Best source for camp information in general (at least that I know of) is the listing that Phillyref puts together each year:
http://phillyref.com/basketball/bask...ereecamps.html
The 2015 list probably won't be out until April or May (ironically after some of the early camps are already over), but you can get a rough idea of when some of the established camps will occur because they usually happen around the same weekend each year. Find a few you're interested in in your region, then either check the hyperlinks or google them directly and see what you can find out. Emailing the POC is also a good tool; they want aspiring officials and your money, so they'll answer.
Then I'd say bounce some of your candidate camps off your veterans; they'll give you the low down on which camps are worth your time and money versus which are just out to get your cash (of which sadly there are a handful). Do 3-person mechanics as much as possible. The assumption is that if you can work 3-p well, then you can work 2-p well, too.
Destination camps can be fun, but truthfully I'd recommend staying close to home early on in your career. That's where local HS and college assignors who can employ you are likely to be lurking in search of talent. Find out who they are and briefly introduce yourself when you get opportunities; let them know when/where your camp games are and invite them to watch you work.
Anyone know of any other good websites where camp info is listed/advertised?