I use the friction sway bar, I loosen the handle on it when I'm in the campground, but I never take it off to back in. I don't turn very sharp when backing in, it all about the approach. If you can master the approach to a site, then generally backing in should require jack knifing.
Some sites probably require you to remove the bar, but I haven't camped on any of those yet.
2010 Jayco JayFeather 213 EXP
2016 Ford F-150, 4x4, 3.5L ECOBOOST, MaxTow, Supercrew, 6.5FT, 3.55 axle