I have some excellent pictures from there, and there are a lot of good angles there. Also, you can shoot the trains from public property. However, be careful. The area between the two northern mains is patroled by CSX police. Be sure to have your camera out and always be careful.
Trains can come at up to four at a time in Porter.
It can be dangerous if you are not familiar with the area. If you need directions or anything else, feel free to contact me. The crossing is where the former Michigan Central crossed the Lake Shore and Michigan Southern. Amtrak owns the Michigan Central trackage from North of the former NYC mainline after Penn Central decined to buy it in 1976. You can see the sign that welcomes engineers to the Michigan Division of Amtrak on the right hand side of the tracks about 300 yds. from the Jct.