Well, when its all said and done, a good .22 cal. Rifle is the way to go. Both the rifle and ammo is light and don't take up much space. My choice would be either a pump action 22 or a Browning Auto 22. I like the browning since they break down. There are some pump action 22 that also break down as well. Either way you want some thing that is light and don't take up much room.