Only the i797 is important. only that will we ask during interview. I stamped in august
You can take other document for just in case if you need. After H1B stamp you have to do employment registration in Kathmandu Nepal ( shram as we Nepali say) only that time you will get some stress. oh document bayena teyo bayena Nepali ko bani ta ho. They will say you to tell your employer to send your job offer in there email. job offer, employment registration document keep with you while returning to USA. you need these document during check in time .