What a coincidence Singh Saab. I am leaving for Jwala ji (Kangra) by tomorrow morning itself.
The route you have mentioned is perfect and I have been to Vaishno Devi twice this year through the same route. In fact this is the best route to Katra IMO
Leave early morning and complete the drive by the day time itself. You will reach katra around 4-5 pm or maybe 6 (if you drive well at three digit speeds), take a hotel and go to sleep while one or two of you can get the yatra slip (I guess they call it yatra parchi). What after that? Well, sleep till midnight and start the way to shrine by 2-3 am. That one will be best IMO
. Rest I am sure that you already have a better plan (mine is the one we follow with gang of guys).