Done Barra and Sollas (with Dont Overfill). Nothing too different about Barra, just remember to wait until the tide goes out
According to the Fireman there the beach at Barra is like concrete and you could drive a 40 ton truck across it. The only slight challenge is indentifying what counts for the notional runways. There are poles at either end to help lining up but not easy to see.
Other than that my advice would be to head west. Coll and Colonsay are fabulous. As is Glenforsa, Plockton and Oban.
Barra Beach Landing - YouTube