If you just need to be in Jeuno for selling things and the price of an extra character isn't going to be a problem for you, you might find it easier to make a mule and move that to Jeuno and when you want to sell things, send them to your mule via the delivery system. That way you don't have to make that trip every time you want to sell something (it's very tricky at low level and before you get your chocobo license)
If you are going to do it, make sure you buy a map of Jeuno before you go and it helps to know that some of the mobs in Sauromugue Champaign are sound
aggro so you can't run close behind them without aggroing like you can with a sight aggro mob.