As far as amateur radio goes and depending on exactly where you are going, I would try the 443.525 +5, 77.0/77.0 machine which is Albermarle/ Morrow Mtn. Others to give a shot are 147.090 +.600 100/100 and 442.200 +5 100/100 which are both KI4DH machines in the 'Mount Gilead, Uwharrie National Forest' area. I very rarely hear anyone on any of those but I have heard the Albermarle one more than the others.
If you're wheeling try CB channel 4. There's also usually a mixture of people on murs, frs, and gmrs. I'm not aware of any gmrs repeaters.
As far as rangers and such go, I have never heard any of the USFS guys on the radio at all. Which isn't surprising because it's incredibly rare that I've ever even seen them. I would assume they are on 172.225 or viper. I have however seen and heard NC wildlife officers on the water and in the area. They definitely use viper but they aren't super chatty. Bow season did recently open for deer so you may see them out and about a bit more. On that same note, if you're hiking play it safe and wear some orange.
If you're camping, Deep water trail that's way down near the end of FR 576 is a great spot if you're trying to be on the water but it's been super busy lately. I usually hit Joe Moffit or Hannah's Creek myself since they are a bit less used and I enjoy the hike.
The weather today and tomorrow is going to be wet but this weekend looks great. Have fun!