From Shanghai HQ to Yiwu

Hi,
1. Is there a hotel nearby the airport/station where I can stay overnight to catch the train to Yiwu the next day?
2. Can I have a hand-care bag, a suitcase and a guitar with me in D train to Yiwu, without the additional fee?
3. Will I be able to get the seat if I arrive 2 hours in advance?

Thank you!