Greenflash,
Welcome to the forums!
Actually most of the trails here are perfectly fine for your Rino.
There are only a handful that are narrow because they were created by ATV's.
The majority are really old mining and hunting roads.
As you look at the Paiute trail map, try to avoid the Black areas.
Those are almost always ATV only.
Most of these have alternate routes and you will have a great time.
If you stay in Marysvale avoid these:
Barney Lake trail
89/87/33east/52/66/73
01 north and south from Fremont Indian State park
That only leaves you about 2500 miles, I hope its enough.