I have two Prime Rivals set up the same. I hunt interchangeably with them. I take both of going on a long driving trip. If flying, commercially I take one of the Rivals and my old Mathews Drenalin as it is smaller and lighter and fits in the same soft case as the Rival. The soft case goes into a large rolling duffle. All my hunting clothes, back pack, hunting boots, etc are packed around the bows until I hit 49.5#s.
I do take off the slider sight from the Rival when I fly and carry it on along with the optics and electronics.
Only had one hunt I needed a backup bow. Was on a Stone sheep backpack hunt about one full days walk from the truck. Damaged the string and limb on my primary bow. The backup bow was in the truck. I suspended the hunt, packed out and returned a few weeks later. Not going to carry a backup bow on a backpack hunt. That said, I got a Cabelas neoprene bow sling that does a nice job of protecting the wheels and string/cables now. Doubt it would have saved the limb damage from the slide rock though.