No holiday packages available.
October to April is best. Hanoi tour package is good in cool and dry months.
Hotel, airport transfer, city tour, and some meals. Few Hanoi tour packages also give Halong Bay day trip.
Old Quarter, Hoan Kiem Lake, temples, museums, and markets mostly.
Yes, very nice for couples. Hanoi tour package gives culture, food, and peaceful spots.
3 to 4 days is enough. Hanoi tour package covers main places in that time.