Neuquen

Neuquen can be categorized as the south of Argentina, which means that hitchhiking is really hard.

Hitching out

East toward Bahia Blanca

There is a peaje in Cipoletti 5 kilometres from Neuquen, but you will likely be sent away by the people working there, and don't expect to get a ride.

(January 2015) a good option is taking a bus from Neuquen Bus Station (also stops in Cipoletti bus station) to Villa Regina(is the last stop). You buy the ticket in the station and cost $35 pesos. I dont remember the number but ask there, is a 90km ride and takes at least 2 hour. In Villa Regina you can hitchhike at the end of the city, after the last light, once you are already on the road, is not the best spot, but if you can get to Chinchales(13km) you have a perfect spot, police control so the cars are really slow and plenty of space to stop everything,

West toward Bariloche/Zapala

There's an YPF at the edge of town where you can ask drivers, but traffic passes pretty quickly, so thumbing it probably won't get you far. If you can get a ride to Plottier, a town about 10km down the road, there's a stop light right before the highway begins again. If that doesn't work and you can get a short ride, you can try the YPF petrol station in Arroyito.

Sleeping

You can easily sleep in the Bus Station without problem, expect cold.