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Is is REALLY necessary to rough it out in the woods and through dark, moldy caves to prove you're some big, macho trainer? Just teleport/drive/fly to your badges, and use the time you saved to, y'know, actually train.
Old martial artists built their muscles exclusively through sparring, because growing any muscle not used in combat was a waste of time. The same principle applies here. That your Pikachu is more used to camping than mine won't help you when I kick your ass because I've spent the time you wasted hiking perfecting battle theory and running drills.
Journeyfics try to copy the games so much they never stop to consider why camping and walking take so much of the fucking story. There's no real incentive for any competent trainer to waste their time setting up sleeping tents when they could just take the highway or call a Flying Taxi.