We used a racheting tension bar in our ranger. It lasted a few years before the ratchet gave out, but it's cheap. The decked system surface is slippery so this helped keeping things in relative location.

Keeper - Ratcheting Cargo Bar, 2.5” x 5.2” x 39.5” - Black/Silver, Adjustable from 40"-70" https://www.amazon.com/dp/B0000AZ9KS/ref=cm_sw_r_apan_glt_i_GVE4Y49VCH7CAAP9G649?_encoding=UTF8&psc=1