What negative report you have got?
------------------------------------------------------------------------------------
The rush in Kamrup Express is as this is the only train from Howrah to Upper Assam and touching North East States, leaving newly introduced Kolkata - Dibrugarh Weekly SF Express/12525...
Many people en-route to Upper Assam from Southern and Eastern part of Indian take this train from Howrah...
So...
more... if their ticket is not confirmed they have no other choice left, they board the train...
Even i have seen many army personal taking this train...
Either Railways added more coaches to this train or increase the frequency of Kolkata - Dibrugarh Weekly SF else the problem
will persist...
Good Railway connectivity what is required for Upper Assam...
-------------------------------------------------------------------------------------
Travelling from Kolkata to Siliguri is not at all a problem, their are many ways...
Day train, Night Train, Bus Service, Flight Service which ever way fit you...
As you have mentioned you will be booking ticket in HWH - NJP Shatabdi Express i hope you will be having a comfort journey...