Is it a good idea for 14 y/o Male to snowboard after serious concussion?

Hello, I am a 14 y/o male in GA. Two weeks ago I had a concussion cause by a 8 foot fall to the back right side of my head. After the fall I had reported seizure for about 10 seconds. Then walked and sat down. I have amnesia to the event and to about 4 hours afterwards. At the E.R. the doctors had a CT taken and it was clean, did a neurological test and then let me go. They did not state any restrictions at the time. Later my dad, who is a Chief of Internal Medicine at the V.A. Hospital called up the Co-Director of pediatric neurology at Children's Healthcare of Atlanta. He advised me to to take part in any physical activity for 4 weeks. Then finding out 2 weeks later I was planning on going on a 2 day snowboarding trip with my youth group told my parents I should not go. I have not had any symptoms after the accident and I feel that I am fine to go boarding (obviously I would wear a protective helmet, and would not take part in any risky activity). I was wondering if there was anyone who has knowledge and would have any idea if snowboarding about 5 weeks after the event would be a good idea