Based on the video context, one of the best techniques for catching large bass on Sam Rayburn in October is using a crankbait. In October, bass are feeding on bluegill and crappie, and they tend to gather around brush piles in the middle of creeks. To effectively fish these brush piles, you'll need a crankbait that matches the depth of the brush pile. For example, if the brush pile tops out at 20 feet of water, you'll need a 10XD crankbait. If it tops out at 17 feet, an 8XD would be more appropriate. The idea is to have the crankbait run at the same depth as the brush pile to entice the bass.
Another option mentioned in the video is fishing a swim jig over the brush piles. The swim jig mentioned is the Megabass Rose Swimmer Swim Jig in three-quarter ounce or half ounce sizes. This swim jig has an underspin and can be effective in triggering bites from big bass.
It's important to note that while using a crankbait or swim jig can be effective in October on Sam Rayburn, you may not get a lot of bites. However, the bites you do get are likely to be from larger bass, ranging from five to eight pounds.
If you don't want to carry multiple crankbaits, using a swim jig can be a great alternative. It's always important to match your bait to the conditions and the behavior of the bass. If you have any specific questions or need further clarification, please let me know.