The most comfortable will be to hire a Jammu to Katra Cab (https://kashmirholidaypackage.co.in/jammu-to-katra-taxi/). . It provides a hassle free ride that is secure and starts at Jammu railway station or airport. This is also combined with Kashmir Holiday Packages (https://kashmirholidaypackage.co.in/) by many travelers. to visit Srinagar, Gulmarg and Pahalgam, in the post Yatra times.