Hello! I too am a Niners fan (engaged to an Eagles fan, pray for my household lol), so I’ve been to a few games in Philly. Wasn’t really harassed at a regular season game while wearing a Niners jersey; only one dude made a snarky comment but I just ignored him. This is the NFC championship though, so people might be more feisty. I would just suggest staying calm and not engaging if someone makes a comment.

I’ve done the drive there and back the same day and regretted it; I much prefer staying the night at a hotel either before or after (might feel differently taking the train instead of having to drive though). Traffic was AWFUL leading up to the game last time we went. We intended to get there a couple hours early and ended up making it right on time. If you do end up driving, leave tons of time to get close to the stadium and park. There were lots of other Niner fans at the game I went to, so you could maybe even find some new friends to tailgate with if you get there early. Tbh the train sounds like a good option though to avoid dealing with the traffic!