and should I consider leaving it in the primary for the duration of the fermentation.
Generally Primary IS
the fermenter. The secondary vessel is for conditioning and clearing.
Do you have an Hydrometer. That will allow you to gauge if it is ready for bottling. If it is then it is up to your judgement to say if it is ready to bottle and if you are happy with the conditioning time.
I would leave in the primary until the latest possible day. Bottle and then enforce an opening date at the earliest 4 weeks after bottling and give storage instructions. 4 weeks at room temperature and then chill for 3 days.
The risk of this is that if you do not have an hydrometer you could be handing out bombs.