Thanks for the replies guys!!

My plaid is the modern traditional length, so wearing it as suggested by the vintage photo Steve posted isn't an option.

And as I will frequently remove my jacket to cool myself from time to time, the option MacMillan posted doesn't sound like it will suit my needs either.

However, PiobBear's suggestion of a flask may be worth trying. I'm guessing the flask with liquid as a counter-weight will need to be about 2 lbs as the plaid itself weighs slightly more than 1 lb.

To date, I haven’t experienced the pulling davedove describes, however, I periodically pull the plaid’s bottom right corner to the right (with my right hand) to spread it across my back, and then let settle to where it hangs naturally.

Thanks again,

Mike