I have a visiting visa (B1/B2), and plan on traveling from India to the US in January. I will very likely have a letter of invitation from one of a couple potential sources (I'll update this market when I do) - for reference, the last time, I had a letter of invitation from MATS when I visited January 11 - May 5 2024. I've been recommended from a couple people to arrive before the presidential inauguration on the 20th, on the chance that the interviews they conduct at the border before letting you in are more restrictive afterward.