Analog film photography and cameras

Anyone help me out here -

Going to be going to America with some friends in the summer, and don't know whether to take my Hasselblad or Mamiya 7 (I know, first world problems etc.) -

Was thinking of taking the Mamiya for its ease of shooting, but its failed to fire before, only being able to fire once I've taken the batteries and film out, which was a nightmare. This plays on my mind all the time, and makes me lean towards the 'blad, and since I bought the Mamiya as a travel camera it kinda makes it redundant?

Hasselblad is heavy, but that's never been a real problem for me. Idk. Thoughts?

Ok ok, seeing as it's redundant now I'll do you a favour and take the Mamiya off your hands for a tenner. I know I'm bailing you out big style here but seriously, forget about it. I don't mind, honest. :)