By May end the snow clearing operation starts by the BRO and roads are opened. You may plan around May end to June. That's the perfect time to visit Ladakh.
In month of April you will not access of Manali Leh Highway via Rohtang La Pass. As it is fully covered in snow. There is no chance to do Leh Ladakh in April from Manali Side. Try from Srinagar - Chandigarh - side. But Manali Leh is much fun.
The roads is cloesd untill the snow get clear so that is the month of june and july. currently BRO are working on the roads. you can check it online when the roads will be open in the month of june
No ! Reasons -
1. Roads will be blocked
2. Leh can only be accessed through flights
3. Places will take time to reach as roads will be blocked by heavy snow
Hey Navneet, Leh & Ladakh is really good in April Tripoto offers some good options. Attcahed below with my comments are some packages. Please take a look, fill the form and someone will get in touch with you. Thanks!