They'll have to run back around the peninsula to pick up the train after it rounds the curve, assuming no reverse loop on the bubble and clockwise running for example. But that might be a small inconvenience, depending on several factors.
You might want to consider a sectional or non-sectional around the walls / donut layout for continuous running but that would require a lift-out or duck-under which some folks find problematic. You could always add a central peninsula later, sort of like Barrow's Cat Mountain and Santa Fe version 2 (3?). Take a Google at the Heart of Georgia ("A better beginner's layout") for ideas.
This is something the layout at the club I go to does. You have to backtrack about thirty feet to the end of the peninsula and then back up the other side to get to your train only to re-trace your steps once more. Not sure I would like that and it really has you bumping into one another on ops nights.
