Tenser's Floating Disk could be used as well, if you want to abide by D&D magic. A magic disk that hovers 3ft - 90cm over the ground, but can't overcome obstacles taller than 10ft - 3 meters. It only lasts 1 hour and only follows the wizard, so you can't command it from atop, but it doesn't need concentration. I'd haggle with the DM to make some allowance on movement while atop it, like having to cast a cantrip (using a valuable action if during combat) or having it last 8 hours if cast as a level 2 spell.