I would advise getting it done as your instructor is doing. If you achieve your PPL in the winter and you want to fly then you have the Night Qual as a back-up should you get back a bit late. Also it is a fantastic experience, people will tell you not to do it as it's dangerous, some will tell you it's fine. There's inherent dangers with all flying so do your own risk assessment based upon your own personal circumstance.
Personally I would think twice about purposely flying a single at night now, but that's only because I have children.
Anyway, you need the qualification, so you may as well do it, and you do get some PIC time when you do your solo circuits. The whole thing is only 5hrs anyway. Do it, and enjoy it
There was a thread running some time ago over on Private Flying, do a search.
CC