I had always been told that as long as the reservation number stats the same, there is no need for new tags. BUT....I changed my reservation from Pop to POR. Number stayed the same. However....when we arrived at DME, we tapped our MBs, the CM directed us to the Pop bus line. Told him no, we were at POR. It took them awhile to find it....close to 10 mins. Told us it was good we had no bags being delivered. Um, no....dd and I had our bags with us since we had arrived by car...but dd's best friend had a checked bag, properly tagged. They did some computer stuff, then told us it was all straightened out. That was at 5:15. They told us the resort name should have been crossed out, and POR written in!
That bag didn't get to our room until past 1am!! It had gone to Pop, and sat there.
So....carefully cross out the old resort name and write in the new one. Lesson learned.