Our Ram is also short bed and the hitch vision is also non visible
To make matters worse, we have a trifold bed cover which when folded up further obscures the view of the hitch.
So I had a left over "Hitchen Rod" from our bumper pull days. The magnetic base holds the rod to the bed of the truck just aft of the hitch. When the kingpin knocks the rod over, I'm there. No hassle
/www.amazon.com/Hitchin-Rods-TM-Rod/dp/B00030LM54/ref=sr_1_1?ie=UTF8&qid=1529274335&sr=8-1&keywords=magnetic+hitchin%27+rods