IMO the bassinette will be fine for night time aswell. We bought the bassinette attatchment with our emmaljunga & was going to use that at night time with DD but she ended up going straight into a cot.

We used our emmaljunga with bassinette attatchment for the first 3 or 4 months so I would say at around 10-12 weeks he should be fine without looking around so much. I dont know what your pram seat is like though so if its laid back enough that should also be fine.

Sorry, I'm no help at all!!!!