Walk as much as you can now so you won't pay later start preparing now so you both will be ready for the hunt . The rifles you have are fine for the animal to be taken at the ranges you mentioned . Have her carry a slinged weight of the weight or a little more then the chosen rifle and back pack of the weight you plan to carry , enjoy the time spent together getting ready . Get your boots and other gear fitting you and her properly now . Practice using the heavy clothing you will be wearing for your hunt so that she is used to shooting with the added length of pull of heavy clothing . As mentioned earlier a good fitting stock will mean more then the caliber . I put a Boyds at one on a 308 and bedded it , it is very adjustable for lop and cheek weld and not a bad price if you go with your bolt gun cheaper then a new barrel or rifle . Don't over look good socks your feet are what carry you and they are one of the often overlooked parts of the hunt , until the first day of the hunt, good fitting shoes are also important , being comfortable and at ease makes the hunt better . Use what you two will be using for the hunt as much as you can , to get used to it before the hunt so that you have less to think and learn about before the hunt so that the hunt can be enjoyed more .