The National government as well as State governments, own a lot of land, of which, because these lands are owned by those governmental entities, there are quite typically restrictions placed upon the public access to that land and to the facilities that are part of that land. While it certainly makes sense that there should be appropriate rules and regulations for facilities so built, on behalf of the public, such as public schools, public libraries, public parks, and so forth; there are also plenty of military installations, military bases, or facilities that aren't even noted as to what their purpose is or even what their particular function is, of which these facilities are often quite restricted and therefore off-limits to the public, with strictly enforced no-trespassing signs, as well as security being in placed to protect such.
The problem with any government facility which precludes the general public from ever stepping foot upon that land or into that facility, is that the public has an implicit right to know what that government, of, by, and for the people is actually doing on the public land, held for the benefit of those people. That is to say, the more secretive any government is, and the more restrictive that government agency is in providing fair access to the general public to public lands and to the facilities so built upon such -- or even worse, to believe that the general public should just mind its own business, is inimical to the best interests of those people. After all, the best government is never going to be that government that keeps an abundance of secrets, but rather is a government that to the degree that it is prudent to do so, is fully transparent and completely open with the people, for these are the very people that the government is setup to actually serve.
A very strong argument could be made and should be made, that every government facility should at a minimum, be available for the people's representatives to visit and to look about, with minimal restrictions, at least some of the time. Further to the point, each facility so utilized, should have to periodically justify its restrictions on its visibility and use, or in absence of such justification, provide more open access to the general public, for it never feels right to see any governmental property, setup in a manner in which the public is treated as a pariah to that government, rather than being properly seen as having innate rights to see for their selves, what is actually going on through that government.
Governments should try to never put themselves into a construct in which the public sees that government not as their legitimate champion for their cause, but rather as a separate entity from the people, and therefore answerable not to those people, but only to those that are the power brokers of that government; so that, in effect, those of the government, or connected to that government, are separate from the people, and hence separately dealt with, in a manner in which the lion's share of the public benefits goes to those that are integral to that government, and the scraps thereof goes to the general public.