I've also had the idea of combining this character with a pacifist run. Does anyone know if you lose faction rep for simply knocking people out, rather than killing them? I'm trying to think of a way round the powder gangers attacking on sight thing.
Is that right? Have you managed it? I suppose you could just turn in a whole lot of NCR dogtags/Legion ears, though acquiring them in sufficent numbers without losing faction rep could be tricky.
On Goodsprings: do you have to save that scavenger from Geckos to become idolised? In my current game, I helped out Ringo and fixed the bar's radio, but failed to save the scavenger, and so am only 'liked', and I don't see any other opportunities to acquire reputation here.
If you have a silenced Sniper Rifle and a good Guns skill you can amass a fair number of tags/ears via (ab)use of the sneak-combat mechanisms. You may want to save before each attempt, just in case, but what you do is take them out from long range while
[HIDDEN], and you will lose no reputation for doing so. As a side benefit you can make a steady income from both the tag/ear sales and that of the resultant loot. Tags can also sometimes be pick-pocketed from NCR troops, however not all of them carry any and they are often in 'alert' status, so this can be difficult unless you have high sneak and a supply of Stealthboys.
As far as Goodsprings is concerned: if the settler is not saved from the three Geckos at the third well you cannot get
Idolized reputation with the town, as stopping the Powder Gangers will not get you there by itself.