just to add another point -
levelling blocks - such as the lynx levellers -are super easy to use.
think of interlocking lego pieces.
just make a short flat-top pyramid and drive the good tire up, lifting the bad tire off the ground.
i did this a while ago at a campsite and the change was fast.
the blocks come in a carrying bag and take up very little space.
much faster and easier [and i think much safer] than using a jack.
no chance of doinf damage to the underside of your AS.
remember - after going up the blocks, make sure the other tires are well-blocked and the TV brake is on.