I don't have a backpack but I use two "Thule Pack ’n Pedal" on my Mountain e-bike for areas which I can't access by car but by bike. One Pack'n Pedal is installed in the front of the bike the other one in the back. One is for the Alta the other one for Gimbal and Camera. The rest in you backpack. Believe me you will need an e-bike to carry all this stuff