One of three mods before our big trip next Saturday. I had these 3x3 posts left over from an old playset. 45 degrees on top and 22.5 degrees on bottom, 3/4" threaded rod with locking nuts on top and the adjustable nuts on bottom. Took about 20 minutes and only cost was my time.
To further keep it from moving, I cut up an old tire so there is rubber on the top braces
2003 Dodge Ram QC 2500 4x4
2005 Nissan Altima
2011 Forest River Lacrosse 301RLS