There doesn't seem to be a lot of up to date information about traveling in Romania. I have just returned from 4 days in Brasov and 3 days in Romania. I thought I will update this thread. Maybe someone will benefit on a later date.

Safety. I did not experience any situations that might be considered as unsafe. The country is welcoming and easy to move around. I did not have any issues driving in Transylvania. Yes, it can be slow. A 50 KM drive can take as long as 1 hour on a good day, 2 hours if there are constructions. However, in general Romanians are careful drivers. We used Uber in Bucharest. We did not have any issues except some drivers do not come to the meet up place. We had to walk around the corner to meet them.

Hiring a driver does not appear to be the thing to do. We stay at the Radisson Blu in Brasov and Hilton Garden Inn old town in Bucharest. No one in either hotel ever heard of hiring drivers for a couple of days. They were very confused by my question.

In Brasov and in Bucharest, business hours are not always posted and around holidays (we were there during Easter) all bets are off. Some of the best museums were closed for a 4 day for the Easter weekend but that information is not posted anywhere. The websites seldom have opening hours. The ones that do can be out of date or inaccurate.