Dual-cab and single-cab varieties support rooftop tents well via mounting on the rear or over-cab. If mounting over the cab - maximum vehicle stability can be maintained, as well as excellent walk up ease of use. To access the tent - it's great if you can leave some tray open - allowing a step up into the tent and negating the need for ladders.
The Hilux Over cab mount of all rooftop tents works the best in regard to minimising body roll and maintaining the vehicles 4wd capability - especially when climbing steep terrain.
Roof foot rail systems by Front runner, Rhino Backbone or ARB can also be common choices of racks fitted to Hilux Dual Cabs - We'd reccommend that you Check your roof top tents specifications for overhanging on smaller racks, as well as roof rack load limits specified by the rack manufacturers before fitting up your tent over the cab without additional strengthening.