If I would research this, I would look at historical evidence of how free the peasantry class have been in relation to landowners, and how the society was set up under feudalism, the extent of serfdom, and see how strong that correlation is with current right-to-roam regulations.
The Black Death also helped a lot. It reset a lot of property relationships by leaving a lot of free land after farmers and their whole families died out - in Norway it took about 200 years before most of the farms were back in operation, and when the population was expanding again there were tax breaks for restarting farms. We can see the extent of it today in the prevalence of last names like Ødegård, Ødegaard and similar (literally "deserted farm"), and similar place names.
Forests in Europe are not exactly unique to Scandinavia.
Thing is much of the peninsula due to the climate can support only marginal agriculture and hence only a very limited peasant population. Not enough pop density to establish any sustainable lifestyle for nobility.
