Yes. you can have a road trip to Manali.
Delhi to shimla
Explore shimla and reach Narkanda
Narkanda to Jibhi via Jalori Pass ( tirthan valley) and reach Manali In manali you have tons of things
( Beautiful old houses and culture in old Manali, Solang Valley, Sethan with igloo House , kothi village, sissu via Atal Tunnel and Amazing landscape of Lahaul and Spiti )
You can cover Aasam and Meghalaya in 10 days.Because to explore all the places in North East one needs ample time. There are eight states altogehter.Travelling hours are long.