My guess: If you are both side sleepers, I suspect that a topper would help since your shoulders may be bottoming out on the platform where as at home with a box spring you may not be. That was the problem I had until we replaced our TT mattress with a thicker residential mattress.
But if you are back sleepers, stiffening the platform may be what you need.
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2018 Jayco Eagle HT 265BHS (previous: 2015 23RB Passport Elite, ProPride)
2015 F250 XLT SB Crew, 6.2l gas
PullRite 16K SuperGlide w/SuperRail
Reese 5th Airborne (bagged) Pin Box
RoadMaster Shock Kit
X-Factor Cross Bracing
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