>>2599398iceland is good, tourists mostly crowds up the popular attractions accessible by bus.
you shouldnt directly compare parks, right to roam country with parks, elsewhere. when you have right to roam the purpose of national parks is not to provide hiking and outdoors area for the public, thats already there through right to roam. its rather to protect certain areas of nature meaning there might be limits on hiking and camping.
there is no reason to limit outings to parks only here, infact you might consider avoiding them since so many foreigners dont understand this and stick to the parks.