Bravely Dragon

I have 8 Summoned: Robin-M, Marth, Eirika, Reinhardt, Sakura and Effie Upgraded: Robin-F, Corrin-M

I accidentally left my 3DS at a distant relative's place. I still have my cartridge for Birthright though, that I was using to play through the Revelations path that I had purchased. I know DLC maps are saved to the SD card, but save files are saved to the cartridge correct? I don't want to do a system transfer since I should be able to get my 3DS back eventually, but in the meantime, can I borrow a friend's 3DS to play through Revelations?