I was at the park today. I do agree that cars really back up at parking, and I feel they could give just two lanes for the vaccines... after all, vaccines don't even back up into a queue for a long ways past the gate. Having four lanes for vaccines seems really unnecessary. The parking did mostly go fine for me, but again, if you're stuck behind someone without a reservation/wrong date, of course that could hold everything up. That's not SFMM's fault. And while I had heard that they didn't open parking until 10:20 on April 1, for us on April 3, they opened parking by 10:05. We arrived at the parking gates by 9:50am (the park opened at 10:30), and I'd say there were already about 50 cars stacked and waiting to get in.
Since I have maintained my membership throughout the pandemic, I got upgraded to Diamond Elite VIP, which gets me up to 4 ride passes. However, they don't include: Superman, WCR, Crazanity, or X2. Even so, not a bad deal. I had Preferred Parking reserved, and since that's taken up by the vaccine, I was directed to the old Valet parking area right next to X2, which was my first time coming from that area... I loved it! But the attendant there said it probably won't last long (again, likely because of vaccinations), so try to enjoy it while you can! We were also told that in the future, we will be given a SF gift card to use for all our credit that we continued to pay during the pandemic.
We generally had a great time, and did way more than we expected to accomplish! My biggest advice is get there early , and leave early. We got a crapload of stuff done in about the first 2-3 hours of park opening, but by about 2 or 3pm, it was like suddenly all the lines for both food and rides are out of control. Get there early and leave early, and I think you'll have a great time. We left by about 2:30 (after a bit of shopping) and thought that was right, as all the lines were starting to get out of control by then.
I also agree that rides are up and down a lot... we saw nearly every ride have to shut down at some point, and then typically reopen 30-60 minutes later, so come back if you can. I don't really fault SFMM for this right now, either... the park is still trying to get it's sealegs, so to speak, and I get a sense there's a lot of new team members who are not quite used to making it all work smoothly. I think it'll get better in time, and given what they had to work with, it's a great start. Yeah, some guests are not great about having their masks over their nose or distancing in lines, but in a large group, it's inevitiable. But most people would move back if asked politely, and if on the pathway, it's wide enough you can easily avoid them. I also love all the new seating areas they've added... I hope that stays! And I'm hoping that in time, they'll add drink stations (like Knott's has) for quicker refills.