Hey Guido,
Let me first say how awesome I think it is great that you are enjoying and becoming so involved with learning ASL. You've asked for what to do now...and I have a few suggestions.
First of all, no offense, but nobody's vocabulary and sign skill can be "excellent" after a year and a half of essentially only in-class instruction. For your level, they may be excellent, but you have not been exposed to nearly enough native language models (deaf people) to be fluent. Interacting daily with deaf people can help you a ton, but it takes many people who are dropped in a foreign country and HAVE to use their new language 24/7 at least a year many times to be fluent, and even that is rare. Also, as awful is this is gonna sound, your receptive skills will almost always be better than your expressive, this is true with all people learning second languages. Though you may be able to express yourself clearly and be understood, your ability to fluently express yourself in ASL is less than your ability to understand people. Maybe that can help get you an idea of your level.
I'm curious what you want to do with your signing skills, you said you are working at a job that will get you to D.C, but do you plan to be quitting that job and going into a "deaf related" field. If you are interesting in purely interpreting, I don't recommend Gallaudet, at least not right away. It has a great M.A. interpreting program, (which is VERY difficult to get into) but an ITP would probably be better to start with...if you are interested in another "deaf related" field, Gally could be the place for you, but be sure.
If you aren't interacting with the local deaf people outside of silent dinners and things like that, you haven't really gotten to know the deaf community or deaf culture. If you don't have friends in the deaf community yet, you are missing one part of ASL knowledge for sure, culture. Culture and language are totally intertwined, and though you can try to learn one without the other, it is essentially impossible. Yes, you can be taught about deaf culture in ASL classes, but that is just one, SMALL tip of the iceberg.
Now, you're talking about going to Gallaudet...arguably the center of the deaf community and deaf culture. They just had a 4 week, (or 5 month, depending on how you look at it) protest for their LINGUISTIC and CULTURAL rights. I'm assuming you've been keeping up on that, as a member of the deaf community in some form, and as a possible future student, seeing your possible university essentially "on hold" for four weeks. Going to Gallaudet is going to be a huge move. Even with the language skills, you will very much be in culture shock. The people there may love you or hate you, that is up to them and you, but just think about the minority status you will gain, and the fact that you will DEFINITELY have to prove yourself.
Okay, sorry if this sounds like a depressing message, just thought I should give you my thoughts, good luck, and I'm very curious to hear your response.
