You talk to her and honestly tel her that this is an opportunity to spend an extra day with your father doing some thing that you both share and enjoy very much.I would definitely let her know that hunting is a very significant part of your life and that it will be some thing that you spend considerable time doing.I think one of the biggest considerations when finding a mate is finding some one who is independant,someone who can function and be happy with their own interest's.You want a woman that is secure,not someone who uses these things as a test as to what you care for more.
The flip side of this is that when you are not hunting you need to be attentive and considerate to her and also encourage her to participate in things that are important to her.