A six or seven weight is a sensible general outfit. Carry a floating line for shallow presentations and a sinking option that can reach the cover without forcing you to overweight every fly. Match the leader’s strength to timber and abrasion.
Start with a Vampire, a small Bunny-style streamer or a crayfish pattern. Make a deliberate count before retrieving, then use short pulls with pauses. Watch the line when the fly drops: a change in its angle can be the only warning before the weight arrives.
If you keep touching weed, reduce the sink time or move the boat slightly farther out. If the fly returns clean from water that should hold submerged cover, explore deeper. Changing the presentation in measured steps teaches you more than changing pattern on every cast.