Most of the roads around the velodrome are quiet and residential with predominately uncontrolled parking.
The entrance to the velodrome is at it's south end, from Burbage road.
Part of the problem is that to the south of the velodrome there aren't that many roads - much of the land being occupied by schools and sports fields, the other part of the problem is that being so close to Poashe Dulwich Village, many houses have two or more vehicles and not all of them have driveways / paved over gardens.
I regularly travel along Winterbrook and Stradella roads to the
west of the velodrome, and don't recall these being totally jammed with parked motors. On the day of the meet that might be different.
North of Half Moon Lane is mostly multiple occupancy semis - so finding parking there might be tricky.
I live a couple of miles away - you're welcome to park outside my place, but the public transport connection isn't fantastic - you'd walk it in as much time as TfL advise using public transport. PM me if you'd like the number of a local mini - cab firm.
It may be the case that one of the adjacent sports grounds rent out some parking space - but I cannot see anything to that effect on the
Good Friday Meeting website.