Ok to add more what if's and where can I go but they said... Best is get a map that shows the Wilderness boundaries of the Inyo NF , Golden Trout ,John Muir and the others listed on the closure order Until DEC 1 ,2020, Understand that other than Horseshoe Meadow Rd that was cherrystemed to the new pack station,the wilderness area is very close to the end of the roads and some of the roads are FS and some are County. So see that helps!
Add to the equation as you are in the Valley proper most likely if not in a building drinking soda pop you are on DWP land with additional rules (Day use only) and rivers and lakes that may or may not allow fishing year round, Next from the Valley Floor you enter BLM the other BLM they have rules about fire and camping and you know don't drive on the flowers, Don't shoot the wild life as that might be a cow or horse and the local butcher most likely will not process your trophy kill or mount the head.
Now as you enter the foothill just above the Valley floor past the BLM area you should see signs NATIONAL FOREST Inyo ... or the Forest you are entering, Some might say National Park another set of conditions but in the NF most roads will lead to a campground, trailhead, lake and some services this is front country you know not back country ,backcountry is once you leave a developed area , most often requires getting out of the coach and using bipedal motion to advance forward.
Now add the hundreds of dirt roads some may get you very close to the Wilderness areas and may be posted closed. either on the ground (sign closed) or with a gate. Again the official maps are about the only way to find the answer.
I like the region 5 interactive map a lot , but if it isn't corrected when to pick a location it might on the first level /layer say something is open BUT YOU have to click on the link and go to that location for the final answer OPEN/CLOSED
Now Inyo NF is on both sides of Owens Valley East side Inyo Mountains and White Mountains Kinda now the west side Sierra side AKA Sierras to some and that's fine, the wilderness areas mostly are closed till Dec. 1 or until opened or closed locked gates and 25'feet of snow but until opened you can not go into the closed areas. Ya but I want to go to the lake at... it is just up the trail... well the wilderness starts just up the trail.
The next few days most of this will be sorted out with map references and the refund for the trail or campground you made this will be the first real clue that Yup I think it's closed. Some Campgrounds closed for the season already as we should see snow and colder weather someday!
Now for the final update with maps and correcting details I rest well not rest since down south doing supply pick ups for next season/ and it is 105 about everyday , I should of stayed surveying they like the heat and cold and wind and traffic and advice where the real property is , they will show you.
Until that time
https://www.fs.usda.gov/detailfull/r5/maps-pubs/?cid=STELPRD3806421&width=full