Are there any rules. For cars or motorhomes?

10.25...no RVs

Any vehicles with more than 6 adults is charged as 'commercial' tour bus and you must pay $5.25 per person.

RVs and airstreams are not allowed. Except the tour buses no heavy vehicle is allowed. One Car fee is $10.25.

I didn't see any regulations for cars other than parking in designated spots. The fee is $10.25. I don't know anything about motor homes but it's possible they may not be allowed because parking is tight, especially during busy seasons. Also, the roads are very narrow. Double check website or call 1st. Hope this helps!