Getting into Riomaggiore in June 2016

I doubt you'll have trouble. This seems to be the floating of ideas, not processes and rules that are locked in place. Read this from a Rick Steves guide, Sarah.

That article was prompted by an unfortunate statement by the Director of the Cinque Terre National Park, who floated the idea of posing limits to the number of tourists at the Cinque Terre. The Director of the National Park may have the power to limit the number of people walking the hiking trails inside the National Park but he has no jurisdiction over access to the towns by car or to the ability of people to get there by train. The car access is regulated by the City governments and there is so far no intention by the mayor to close roads. Even if the City decided to limit access to non resident cars, you would still be able to park at the Parking structure at the La Spezia station and take the train from there (which is a recommended option for you even now). Obviously it would be impossible to stop tourists from reaching the villages by train. The villages are along a major rail line connecting Genoa to Rome, therefore I don't even know what that Director was smoking when he stated that. It would be unthinkable to stop trains along that railway line, which is used by tourists and residents alike. The Cinque Terre are in fact real villages where people actually live, they are not a theme park. In fact that stupid public statement was immediately refuted by the Governor of Liguria, who said publicly that there will be no limits to anything and added that the Director of the National Park should shut up and not make stupid statements on matters on which he has no jurisdiction which could negatively impact the tourist season (the Governor belongs to the opposing political party, so the criticism was very strong). The Cinque Terre are an important source of revenue (and tax revenue) for the Region of Liguria and the news, reported worldwide, scared the hell of tourism operators who also criticized the Director of the National Park for making it.

You options to reach Riomaggiore by car are 2.

1. Park in La Spezia at the large multistory Station Parking structure (open 24/7) then take the train to Riomaggiore.
2. Drive to Riomaggiore then park at the small parking structure (2 story) at the entrance of the village. You won't be able to drive further than the parking garage as access is restricted to residents and service cars beyond that point, therefore you will need to proceed to your accommodations on foot (besides streets are so narrow there is no parking).

Option 2 is the one I always used (I have never used option 1). But that's because I'm lazy. Option 1 is actually faster, costs less (the parking in Riomaggiore is not cheap). Also the parking structure in Riomaggiore closes at night (at 8pm if I recall), beyond that the car is stuck inside for the night. The other thing to consider is that the last couple of km of drive into Riomaggiore is on a very narrow road which is no wider than 3 metres (10ft), but yet is a two way road. If you are not a master at the wheel, capable to negotiate a car through very narrow spaces, the chances of scraping the walls along the road are high. Often on the way down you meet a truck coming out in the opposite direction. Since in narrow road the vehicle traveling uphill has by law the right of way, I often had to back up uphill that narrow road in reverse until I got to a wider spot where the truck could pass through. If you are the type who doesn't know how to back up your car inside a one car garage without scraping the walls, driving to Riomaggiore is not for you. You are better off parking in La Spezia.