H4 visa and EAD holder, documents required at USA airport

[poojag]

Hi,

I am on H4 and came to India for vacations. I plan to travel to USA in July while visa is valid till august.
I need to know what all documents I need at port of entry.?

As I read across this website, it says I need I797 and passport and valid visa.
Since I have work permit, I have EAD card and I797. But unfortunately I am not carrying I797 original copy or EAD card with me. Does a scan copy works?

My husband is also in India, and plan to travel before me. Will traveling with him will help me as he has his original I-797 with him.

Please reply.

Thanks,
Pooja