Not all carry-ons are suitable for use on a hiking trail, and not all hiking packs should be used as a carry-on. It takes serious versatility to be good for both, and one of the standout brands that meshes travel and outdoor functionality well is The North Face. The Jester backpack is a prime example.
The Bessport 3-person Backpacking Tent offers enough interior floor space for three adults while maintaining a low profile for reduced weight and wind resistance.