None. NAHL/NCDC main camps were months ago. Most teams have bursting rosters they're thinning right now, with players sent down to their lower teams. Your best bet is find a Tier3 Junior team (NA3HL, USPHL Premiere/Elite, EHL) looking for an upgrade. Good luck.
Rosters are never set, at any level of junior. Every team will always take an upgrade. Always. There is zero loyalty.
So it depends on your kid. If he's a true stud, pick a team.
More likely, do what this poster says. But, there's a HUGE difference between those options.