No worries about stay at Guwahati Railway Station: you have 2 options ЁЯШЙ
1). Go with rr.irctc.co.in for booking ordinary dormitory or Retiring Room (тВ╣300 to тВ╣800 for 12 hrs) Normal facility. But book before you reach.
2). With this (shown in pics ЁЯУ╕) private Retiring Room, little costly. For booking call ЁЯУЮ @ 6003497117 or you can book after arrived here also & enjoy luxurious facility ЁЯШО