All What CMAW said! ;)

Have been three time in Romania, 2014, 2015, 2018. many little roads possible, also infinite gravel roads. Many many roads haven been fixed the last years, good for Romanians, I don't like that, I prefer bad roads, means most of the time less traffic.
I liked all Romania, get lost .... most I like Maramuresch and Bucovina, Bucovina is very special. Danube delta also great!
Transfagarasan ist great! but! skip it on weekends! and/or start VERY early, means 6:30-7AM you enter Transfagarasan, than you will have the road for you alone. Be aware of bears on Transfagarasan, stupid tourists made it their hobby to feed them, now they are roaming around that road.
Should be no problem to find rooms, anyway I would book the day before or in the morning while having lunch stop.
Have mushroom dishes! Impressive the tons of mushrooms they take out of the woods.

Here some visual motivation if you feel like:

https://stefanrohner.exposure.co/romania

https://stefanrohner.exposure.co/romania-1

https://flic.kr/s/aHskhcNTy5


""WC"" on Transfagarasan ;)