There's like 4 gas stations out near Jordan right off 64 that sell bait. If you're coming from North Raleigh then I would guess you would pass the stations at the corner of 64 and Beaver Creek Road. I typically launch at Ebenezer and that's where I get my bait.
Hollemans ramp is on Harris.
Have you tried Falls Lake? That lake is full of fish and would be right in your backyard.