Hey Ankit, Best time is visiting on Royal bathing dates if you want to see Naga Sadhus : 15 Jan, 21 Jan, 4 Feb, 10 Feb, 19 Feb and 4 March ( Maha Shivratri ). Go 2-3 days before the Royal Bathing dates. Happy travelling!!!!
You should attend this Kumbh Mela in Shahi Snan Dates. Prayagraj is planning lot more thing this Kumbh. If you really want to visit Kumbh at Prayagraj better to plan your trip. For Tent Booking
https://prayagsamagam.com/web/index.html Good Luck!!