D Ring Tie Down Anchor 1/4" Heavy Duty Trailer Anchor Lashing Rings 2400 lbs Capacity Trailers Trucks Bed Anchors Bracket Hooks Kit for SUV,RV,Camper,Van,Car,Boats, Motorcycles Surface Mount (Black)

https://a.co/d/70zaeyI I didn't realize you were OP talking about an eye bolt. I thought I was replying to someone else using an eye bolt screwed directly into the stud. We use the anchors (linked above) directly into the studs. One thing I like about your idea of placing a board across two studs is it allows more choice in placement. I hope this makes sense.