Gary offer good points.
The tri-pod or bi-pod pin stabilizer can only stabilize the front of the trailer for side to side movement. A product like the BAL telescoping stabilizers at the rear for up and down and side to side movement. And adjustable Chocks for fore and aft movement......or JTs or a similar product does the same.
Which hitch ??? Just like which truck brand.....the best is what one owns or what a shill pushes or what one owns at that time.
There are several brands in a manual sliding hitch.
The SuperGlide for a auto sliding hitch.
Check out the Anderson Ultimate or Pullrite 2400 LSR hitch systems.
Also check out the Sidewinder system from Reese.
Spend some time on each hitch mfg and decide which hitch systems may work better for you.