I have limited knowledge of the lake but you may find some pertinent info that might be helpful in this document put out by the Va fish and game.
Some others may chime in and be of more help. Good luck
Smith mountain lake water bodies report
Striped bass are distributed throughout the lake during most of the year but are
concentrated in lower lake areas during the summer and early fall months. Coves are
typically not very productive for striped bass during the summer and early fall months so
anglers should concentrate their efforts on the main lake when water temperatures begin
to rise. Striped bass anglers utilize a variety of fishing methods such as drifting or slow
trolling live shad, trolling plugs and bucktail jigs, or casting top water lures and bucktail
jigs. Anglers use live shad throughout the year, trolling is most popular during the
warmer months, and casting top water or shallow running plugs is most productive during
the spring at night. Most striped bass are caught between the dam and buoy 64 of the
Roanoke Arm and up to buoy 40 of the Blackwater Arm. Although these are the general
areas most striped bass are caught, these fish are very mobile and may change locations continuously depending on forage availability, water temperatures, and spawning.