The Kumbh Mela is attended by thousands of people on every day. The major event of the festival is a ritual bath at the banks of the rivers in each place besides other activities like religious discussions, devotional singing, fasting, meditating, reciting the scriptures , mass feeding of holy men and women and the poor, and religious assemblies where doctrines are debated and standardized.

Mass feeding of holy men (sadhus) / women and poor people is considered as Narayan sewa , which literally means service to the God. Those who could afford or many people in the name of their ancestors offer free meal to the poor people / holy men & women especially during the Kumbh mela, which adds to your list of good karma. 

It is very interesting to attend the processions taken out by various akharas on auspicious days. As the holy saints pass by on their various and sundry & well decorated conveyances -- , horses, palanquins, chariots, cars, and bulls -- they are continually transmitting waves of powerful shakti (energy) to all the people who witness this awe-inspiring and most auspicious event during the Kumbh mela. Devotees are overwhelmed by the palpable spiritual vibrations that pervade the entire atmosphere.

Some of these bathing days are designated "royal,". It is on these days that the naga sadhus (naked mendicants) parade and bathe. The Nagas smear their bodies with ash and sport long matted hair. Constant exposure to the elements and rigorous self control makes them impervious to the extremes of hot & cold weather 

While the parade of saints marches towards the Har Ki Pauri, the sounds baffle all description -- the shout and cries of ash-smeared sadhus mingle with the neighing of horses & bellowing of bulls. Gongs and drums beat, trumpets blare, conch shells blow and bells ring. In the midst of this cacophony, musicians and dancers also perform .

On other days, there will be devotees bathing besides other events and random processions.   
The origin of Kumbh
Important activities at the Kumbh 
Important events during kumbh mela 2010
How to reach Haridwar & suggested tour program