You have to check everything, bow, arrows, and broadheads. Check with your airline as to how much an extra checked piece will cost you, some airlines only charge $20-25 as long as your total checked weight is under 50lbs.
I put my t/d Pronghorn and arrows in a piece of drain pipe with caps inside my backpack as well as the broadheads and knifes and all my toiletries. One piece of checked luggage, no dramas. My carry on is my daypack, it has my binos, quiver and a change of clothes, just in case my checked bag gets delayed. With your carry on, make absolutely sure there is nothing that is sharp in there or wet. It's a hassle to open your bag and take out toothpaste and stuff like that. The KISS principal is essential for flying these days. Have a great trip!