Above is the official announcement, click to enlarge, and since the image links will not work here are the links:
Momentum
Volunteer
JackForSenate_homepage
And Jack cearly wants his supporters to show the will of the people, where more is better, but not as a mob will.
As a courteous and orderly and pleasant meeting and greeting (and hooting a bit for Jack - hooting politely).
The delagates have to be free of harassment, because Jack would not want any disorderly or counterproductive outcome. Only to win. That's all.
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Info about the locale is here, but coordinate your effort through the two email addresses - momentum, above, or volunteer, above, or just give them a call - good luck getting through - with numbers on the JackForSenate's contact us page.