Enjoy your trip!
Guessing you mean the king-pin tripod stands?
Some find them helpful in stabilizing the trailer or relieving some of the frame bounce while parked. There are a lot of variables in trailer design, construction, landing gear, stabilizers, leveling gear, and setup techniques. So you'll hear mixed reviews on how effective they may or not be. Difficult to make a blanket statement on their effectiveness. Experimentation is key.
I notice a lot of them installed in a way that seems less than optimal, in that the stand is to short for the king pin height. Necessitating the legs being retracted in to a tiny foot print maybe a foot apart?
DW purchased a deluxe Ultra-fab with extensions off CL a while back for a fraction of it's initial cost. I find them to be over rated and not really worth the trouble / expense in our case.
On our last coach we found one simple CW screw jack-stand under the trailer rear hitch receiver did more to eliminate bounce. YMMV
Happy motoring
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J & J, DRV Suites ES-38RSSA #9679 GM Denali, 3500HD-Max, 4x CC, 8' DRW,
EZGo-TXT, Clubcar Precedent
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