Hi,
Ours is a different rig, but we can get caught out still on the road and needing a spot to overnight. Forestry roads can be good, usually plenty of little spots to pull off the road. (This is a 'plan B', so it is only an over-nighter to get some sleep.)
If you are near a town, use the GPS to search for things like picnic, lookout, toilet, they will often have a flat, quiet spot to kip.
A bit of map work can often find a promising spot well ahead of time.
cheers