Hello Traveler, In the morning time you can visit to Har Ke Pohri Ghats and later on you can visit to Chandi Devi temple by Cable car, take a break for lunch then you can start your drive to to Rishikesh it is around 1 hour drive plan your stay in Hotel on Bank of River Ganga, In the evening time visit to Ghat you can be a part of Holy Aarti. Next day you will have to go further to Shiv Puri - as mostly rafting start this point to Rishikesh, You can do bungee jumping and flying fox activities in Rishikesh
Day 1: Reach Rishikesh in the morning. Then go for rafting the same day.
Later in the evening, spend the night at a beautiful cafe by the side of river.
Day 2: Go for the bungee jumping at the highest bunjee jumping point in India. You can refer http://jumpinheights.com for that.
For Rishikesh, i will definately help you for planning your trip, Rishikesh- this place is full of peace like several ganga river sides , shri Ram jhula , shri Laxman jhula, u can feel nature there as there are several jungle view sides too where there are so many falls too. as I suggest u should visit there at once ..
enjoy Summer n dont forget to try water games there .rafting ,bunji jumping nd many more , so enjoy ur summer as U have chosen the best place for enjoying ur Summers.