I have to agree with CW on having the backup, and if that is your only Handi, then that's a perfect excuse to buy another, like anyone really needs an excuse!
Where I hunt it's just a matter of driving an hour and a half to get there, but still, I always carry another firearm just in case.
Even then, I always carry a sidearm besides the extra rifle, and my possibles bag has my extra loaded magazines for the pistol, sometimes the GPS, two knives, binoculars, first aid kit, duct tape, pencils, pens, twine, matches, TP, and as much extra ammo as I can stuff in there for the three guns!
And lets not forget the bag with the cold drinks and munchies, and plenty of water!
I'm not talking going into the deep forest or mountains for several days, but the brush country of south Texas can be pretty unhospitable when out there alone.