West Yellowstone
I don’t know about the Grand Cañon, but I recently (June, 2020) stayed in West Yellowstone and it was just fine. The entrance to the park is very close. I went into the park every day and had no problems getting around West Yellowstone or the National Park. Prices were a bit high and the RV parks are not fancy, but I didn’t care; I was only sleeping there (23 foot motorhome) and, other than laundry, didn’t use any “amenities” anyway. I spent the day in YNP.
West Yellowstone has any stores or restaurants that you might need and they are open long hours. Good traveling!
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