I will soon be going on a business trip to USA. I will be travelling on a B1 visa. My business will be for 4 weeks there. I would like to spend a week after I conclude my business, with my sister, who lives in US.
For some context, I have been on 3 business trips on the same visa earlier.
My employer's invite letter expects me to provide the exact dates for From and To and the duration. I'm bit confused about what I should mention. Should I mention the 4 weeks that are strictly business, or 5 weeks of my total duration in US? My employer pays me for accommodation, per diem only for the 4 weeks of my trip. This is also mentioned in the letter, apparently.
Will 5 weeks be considered too long for a business trip? In the past, I have always been given a 6 months duration in my I-94. My last trip was in 2011. Not sure if the immigration screenings have become strict since then.