If you are interested in exhibiting your work, attending SOFA would be a good way to gauge where you fit into the J+M world. Most US art jewelry galleries are there: Sienna Gallery, Ornamentum, Jeweler's Werk, Charon Kransen, Aaron Faber, and a few more that slip my mind.
If you are interested in developing techniques and interacting with other artists, then attending a residency program (over the summer, usually 1 - 6 weeks) is a great way to network and receive insights on your style of making. Haystack & Penland are very well known and respected (artist instructors: Maria Phillips, Lola Brooks, Heather White, Arthur Hash, John Cogswell).
As you are deciding where to attend, ask the GS director how they can support your interests as an artist in a small program. Some schools will flat out pay for your travel, tuition and per diem to attend outside enrichment activities...they may also have special relationships with several. It can't hurt to ask.