Idk where you’re coming from but I almost always Uber (or walk, but it doesn’t sound like that’s applicable)

If you must drive, just go straight to the mall lot and walk across the street because the station lot fills up fast. I think the Amtrak lot is $15 a day flat, and the mall is like $2-25 depending on how long you’re there, but nothing is quite as expensive as missing your train.