That should be fine.
What gets faked? There were basically two paths for counterfeits, which basically merged .
A. Pins of high value. These started almost immediately after pin trading with things like the WDAC Haunted Mansion Dangle, Pirate Dangle, Maleficent Diva gift, Wet Paint etc. At the beginning, these were commissioned by US people to capitalize on the demand. Many of these have notes or photos of the fakes on Pinpics.
B. Pins of low value. This actually started from A. The original Cast Lanyard series were highly desired and would sell for $50 (about ~$100 today). So these were faked because of demand. But then as cheap pins for lanyard trading dried up (people had worked through the leftover cheap European pins by Sedesma and Propin), the same people switched to duplicating the Cast Lanyard pins. This became a concern ~2005, and there are far too many to consistently track.
Then the factories learned this demand existed, and stopped waiting for US customers to ask them for fake pins and just started making them themselves and offering them to their existing customers and using them to gain more. This is true for both A and B type pins. An old rule used to be that fancy pins with multiple layers, hinges, etc wouldn't get faked. This was true when the counterfeits were predominantly B. People didn't want to pay the extra costs for the extra detail on pins that weren't valuable. But when the factories are doing it themselves? They make whatever they have molds they have. So it's no longer a good rule for newer releases, and that's why you see a bunch of DSSH and DLP pins that are more elaborate but counterfeit, but does still work as a loose guide for older pins.
This set is old, first year of pin trading, and never had high demand, and that makes it not a good candidate for counterfeiting. Not the fact that it was an LE1000. The original surprise pins at WDW, like Wet Paint were LE1000s and those were faked because they were also going for a lot of money.
