The thing I would say about GDC is that if you don't already know how it will benefit your career, then it probably won't. Do you have specific business or networking goals in mind, and a reasonable belief that being there will bring you in to contact with people that are willing to help you meet them? If not, then the expense will not be worthwhile for you.
There's this whole buzz that suggests "all game developers need to go to GDC to network" but the fact is, the vast majority of developers never go there, and many who do go don't find it as transformative as is suggested. And this isn't surprising - the organisers have a vested interest in making it a popular event and this hype sells tickets. But there aren't hordes of recruiters looking to hire any newbie that walks through the door, or investors waiting to shower money on every indie dev that shows up with a demo.
By comparison, when you consider smaller meet-ups, the equation is quite different. You're still unlikely to meet someone who changes your career overnight, but the cost is far lower and you have little to lose, and plenty to gain on the networking front.
It's also not a binary choice between "now" and "later". You can go more than once! Each time you go, you have a chance of meeting people that could be useful to you in future, and vice versa. Just be aware of the cost/benefit balance.