The reason they are administered Steve is to ensure that these areas of outstanding beauty are protected from being ruined by being over visited and having wildlife and their habitats destroyed, and the landscapes that the public come to see are not covered with camp sites, cars and litter etc..
I appreciate that and it is good that it is done but closing them would appear to be an impossible (if not illegal) task for our UK parks. Not sure about the US parks but they must be accessible by means other than by road so it is probably also very difficult to fully close US parks too.
Yes, of course most of the parks you can't practically close, but you can officially close them - close the road gates, shut down the services, etc. In some cases, that's not a giant obstacle to using the park (a lot of the parks here on the east coast can be walked into from not too far away), but someplace like Yosemite it would be a different story. And some of them they can't fully close anyway because there are communities within the park - can't deny residents of the park access to their own homes. I'm sure they'll work something out - probably have to have the gates manned to turn away non-residents. If you want to see some amazing parkland in that part of the country, try Capitol Reef - it is cris-crossed with public roads. The only thing would be the visitors centers would be shut down.
When some parks get closed in winter I'd either bring my mountain bike or snowshoes and just park at the gate and enter. In summer, why the hell not just take a bike from the gate and have the pace to yourself. If the govt does shut down, I might head up to Arches to see it for the first time ever without people!
There is a possibility the government will baracade the roads leading into the parks.
My thoughts too. IIRC Zion has gates that can be closed at the entrance but definitely further on the have a gate the close during the summer to make people park their cars and take the bus. One could get arrested for trespassing.
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.
I highly doubt a trespassing charge would hold, especially in a place like Utah. You would still have to get caught, and then, have something debatable in terms of legality to have anything hold up in court. "Sorry sir, you can't take pictures in this park today. Our government is shut down". --yeah right.
Under normal seasonal closures, the Tioga Road is gated just above Crane's Flat. It would be great to bicycle up the road, but alas, the fine makes it not worth the fun.
Now Redwood National Park would be near impossible to close. One dead-end road is gated, but there are no other gates. And fortunately there are the surrounding State Redwoods Parks with access (but who knows what the State budget mess will result in.)
At least with LF landscape, a bad day of photography can still be a good day of exercise.