Is it possible to get in with just a photo of my vaccine card? I lost the actual paper copy.

Yes

Yea, copies are acceptable. Plus your id

Yes. The rules they have posted say you can use a card, a clear photo of the card or the vaccination app they support.

Yes, that is what I bring

You can use a photo of your vaccination record, which is what my mom and daughter did, or you can show the vaccination app, which is what I did.