There is bridge work on the north side of the tunnel just south of Heceta Head Lighthouse just north of Florence. They are replacing the guard rail and doing other work on the bridge. Currently there are flaggers with one way traffic. The tunnel is not a problem for motorhomes.
When traveling Hwy 101 in a RV, strongly suggest traveling north to south. That way the numerous pullouts and viewpoints are on your right and you do not have to cross traffic to stop. The same with pulling back out into traffic. If traveling north to south you do not have to cross oncoming traffic to get back underway.