This pattern was originally available as a printed pattern for the 2017 Row by Row Experience, and is now available as a PDF.
From Pen + Paper Patterns:
The Travel Trailer block measures 9 1/2" x 10 3/4" when completed. This block pattern is great for minis, banners, pillows and more! Pattern includes detailed instructions, diagrams, and tags for organizing the cuts of fabric within the block. The Travel Trailer block is made mostly using conventional piecing with the exception of the flag section which is paper pieced. There are directions included in the pattern for replacing that section with one piece of fabric if desired.