Dear recentely I went for Umrah in the 1st week of March.i can tell u about my journey and then u can think and deceide about ur self.
I left doha on wednesday at 11 am as i on wednesday you will find less cars at the border. i arrived at 12 and it took 1 hour to clear the border.
I arrived at Riyadh arround 6 pm and tsayed there in a hotel.then next morning i left riyadh to madina . I arrived at 5 pm in madinah and tsayed there for two days and then went to makkah for Umrah.On the way back again i stayed for a night in riyadh.

I think going all the way will be difficult and tiring.

nothing happen to me as i was driving car alone.just check ur tires as the road is good but long and you will be driving at 140-160 k.