I don't have a jointer in my shop, so I've been using an auxiliary bed with my planer. I place the work on the table and add shims to fill voids under the piece. The auxiliary bed is smooth enough it pulls the work and shims through together, but usually I tape them in place to make feeding it through over and over easier. Once I have a flat side I'll flip it and plane the other side (without the shims ).
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault