In our HOA, streets are county maintained, but like a lot of streets in the south, they are narrow. Parking isn't allowed on the street by owners at any time, only guests. In our covenants, it specifically states why parking on the street isn't permitted - it is a safety issue with Emergency vehicles.
As for the OP's issue, I would just use the driveway of one of the neighbor's that won't move their car(s). Pull straight in, then back the rest of the way to your house. If they see you do it, at their angle, it will probably look like you are going to hit their car(s) as you are backing out. They'll probably be a little more cooperative in the future.
I would also firmly, but not aggressively, remind these owners that parking on the street is a violation of the covenants. Let them know you are trying to resolve the issue without resorting to complaining to the HOA. Give them the choice. If they don't move the cars, then it was their choice to have you complain to the HOA. Most likely they won't comply until they start racking up fines for non-compliance.
A lot of people have no idea what they sign at closing. At our first HOA meeting after we moved in (about a year after the subdivision opened), someone asked how many home owners did not have a copy of the covenants. About half of the owners raised their hands, but they signed a document stating they received the covenants, understand them and agree to comply with them.
-Michael
