You should plan Himachal Pradesh and Uttrakhand in April and May In Himachal Pradesh visit Shimla
Dalhousie
Dharamshala
Kasauli
Manali Kullu Tirthan Valley
Barot Valley Solan In Uttrakhand visit Mussoorie
Dhanaulti
Chakrata
Auli Ranikhet
Nainital
Kausani
First on the list is Ladakh, which is known for its stunning mountains and ancient monasteries. The scenery is breathtaking, and the serene beauty of the landscapes is something you don't want to miss. Another destination to consider is Ooty, where you can enjoy the pleasant climate and explore the tea plantations. The serene lakes and lush greenery are also a treat for the eyes.
During this period Kedarnath, Badrinath, Rishikesh is the best option as these place are meant for april, may, june, july only. After this the situations are little difficult. You will not regret any of the options are visiting. The Kedarnath is one of the best place for peace, trek andas well as cool place during this season. The badrinath is along the way a better otion if you don't want to trek. The place are easilily accessible. For affordable room booking directly contact.
For reference :-
www.traveltonirvana.com