Frustrated Father 

Eight years ago my wife got a federal felony charge for meth.. She has served 18 months and we have turned our lives around since.  We have two boys 15,13 that are going elk hunting this year with me so I purchased a rifle.  The only problem is that I have to keep it at my fathers house 40 miles away.  Can anyone point me in the right direction for the correct interpretation for what being in possession is.  It seems to me that the boys and I should be to keep our guns here at the house so long as my wife doesn't leave here with them.