Definitely drive it with your truck. It's very nice and stop at Slide Rock State Park... there may be some swimmers in the beautiful creek. Also, near the top of the drive is a very large pull-off and there are usually Native Americans there selling nice jewelry. Hope you're able to do some trails out of Sedona. It's such a pretty area.... but very crowded. Our first visit was many years ago when it wasn't really 'discovered' yet.... quite a change.
Also.... coming from Monument Valley Tuba City is a good place to buy fuel. Usually more reasonable than Flagstaff and definitely more reasonable than Sedona.
Continuing down 89 from Tuba City on the right at Cameron immediately past the Colorado River will be the Cameron Trading Post, i believe is the name. It is a high quality gift shop (& has less expensive ones, also) but they have a very nice restaurant. Navajo tacos are awesome! Nothing like the typical 'taco'.
https://camerontradingpost.com/shop.html
At that intersection is Hwy 64 which would take you to Grand Canyon Nat'l Park. If you weren't planning to go there you could at least do a loop from there, through the park and exiting on south 64... then to Flagstaff by 64/180 or 64 to Williams & I-40. Many canyon viewpoints to park along the upper 64. Good road.