Vinyl plank flooring - snap lock with history of success?

I installed in a house with uneven floor. Had to have it removed because after a few days the long seam opened -- short seam did well. In a RV with large change in temp may be a problem I install THIN nail down engineered wood in my TT. Used short "brads" to hold down the floor. Yes the slides marked the floor (even after raising the slides as high as I could) at two places but much better than carpet.