Nice campsites!
We had never been to Ft. Gibson Lake so we thought we'd give it a go... and we really enjoyed it. We stayed at Seminole Campground in Sequoyah State Park for two nights at the end of May and had a nice time. The camp host greeted us when we pulled in and gave us the low-down and provided us with maps on the campgrounds and the area.
The campground, was really nice. It was clean, well kept, and quiet. With only one road in and out you'd think the traffic my be kinda bad, but it wasn't. It probably helps that there's not a boat ramp directly in the campgrounds. The sites were spacious and included a nice level concrete pad, a concrete picnic table, a firepit, and a lantern hook. All the sites away from the shore had sewer connections. The ones closest to the water did not, but there's a dump station right outside the campground gate.
Being kayakers we like campgrounds that have easy water access and Seminole campground did not disappoint. The water level was up about 15-20' this particular weekend which made it easy to launch/land and with floating debris due to the water level we pretty much had the lake to ourselves. There are also hiking trails in the area including a paved walking trail.
There's a convenience store a couple of miles away for ice, beverages, etc. It's about 12 miles to the nearest Walmart to pick up those things you forget... we now have dedicated camper pillows.
Since I sometimes need to login to work, I'm always curious about the wifi. While the campground itself doesn't have wifi, I was able to turn on the hotspot feature on my phone and get connected without any problems. We have service through AT&T and didn't have any issues.
The camp host told us that this campground is one of the few that stay open year round so we may be back in the fall for a different view.