Can't bring TT home because of neighbors parking in street?

Take a few photos of the cars in the street. Send to the HOA with a nice letter noting that these neighbors are relatively new to the subdivision and may not be aware of the rules that prohibit parking in the street. Also mention that this activity occasionally keeps you and others from accessing your drive way.
Ask them to investigate and make sure they are aware of the rules.

You pay an HOA for a reason, use them. If the neighbors get mad, etc. so what! Sounds like they're not that good a neighbor anyway.