Just make sure to tell the guide you are after big fish only and be clear. Guntersville is AWESOME!
2 years ago I was in Austin Tx for a conference and learned that the local lake was a top 5 producer of 10 lb bass in TX. I spent half my saturday afternoons calling guides and finally got one that agreed to take me on sunday morning until noon as my flight left at 1:00 pm. I made it clear that I was an avid bass fisherman and was only after a big fish. Didnt care if we only caught 1 fish all day, if it was big then I'd be just fine and was not interested in catching a bunch.
He tested me for about the first 15 minutes and handed me a few different rods and reels and lures and after I skipped a jig under a dock with a baitcaster, he finally looked at me and said, okay, so you werent full of yugo and actually know what your doing. he said most people just lie to him.
Anyhoo, I caught 5 fish that day, 1 went right at 5-6 lbs. But I hooked the monster. She ate a topwater and jump twice. guide went to net her and she jumped over the net wrapped the trolling motor and snapped the line. She jumped again about 2 minutes later and tossed the plug that we retrieved. After sitting in silence for about 5 minutes, he leaned over and said my biggest fish from here is 13lbs. Your fish didnt weigh 13, but I'd bet my boat it went 11. Still a little sick over that one.