The Collaborative International Dictionary
go backpacking
backpack \back"pack\ v. i. to hike while carrying a backpack; -- often used in the form go backpacking; as, to backpack through the forest.
Usage examples of "go backpacking".
They go backpacking, play tennis, maybe sleep together, maybe not.
Why the hell Flora needed a pistachio-green silk tunic to go backpacking, Georgie couldn't imagine.
I had a dog back in Colorado, a fortyfive-kilo Akita who used to go backpacking with me in the Rockies.