Yes you bring camera

in varanasi Kashi vishwanath Temple is good to visit in morning though you can go all time in day or in evening also,ganga Ghats are good to visit in evening and ganga aarti is a daily event start at 7 30 pm better to see seating in a boat,saranath is a very good site to visit about 10 kms from varanasi,they may visit market too,Bodhagaya is about 260 kms from varanasi ,trains are available from varanasi junction and Mughal Sarai railway station for Gaya ,Gaya and Bodhgaya are adjacent and in between distance is about 15 kms ,at Bodhgaya Mahabodhi Temple,Bodhi Tree,great budhha statue and temples of some other countries like Thailand,Japan etc are to see,at Gaya Vishnu Pad temple is a famous temple,one should stay at Bodhgaya it is very good and clean place to stay ,if your parents have time than they should visit Rajgir and Nalanda about 60 to 70 kms from Gaya-thanks-

There is some restrictions to enter with belongings like enter with mobile phone or wearing shoes inside.You can take camera but entering with it is chargeable.There is no time for preying beneath the tree.You can do as much as you wish.