They are now fully open. Their barge can take at least 2 trucks, but I believe it can take maybe 4? Their reservations are done by phone. It takes maybe two minutes to schedule and they were pretty flexible with my schedule.
Just got back a week ago myself. Their ferry took three vehicles both ways; two trucks and one SUV. Call in advance, I'd say at least a week preferably 2+ weeks. If nobody picks up, call back 15 minutes later.
Yes, fully open. Definitely call ahead as they fill up quickly. You have to call, no online options. Keep calling the phone rings off the hook there.
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