Just got home from Glacier and on the way home also visited Craters of the Moon. Stayed at Mountain View RV Park & Cafe in Arco,ID, which I highly recommend. Good Sam park, FHUs, big trees (we had site D2)and FREE breakfast every morning (2 very large pancakes, 2 eggs and coffee/tea), very nice owners. Mt. View is about 18 miles to Craters of Moon, which we enjoyed. Spent one day doing the drive and hikes in the park; second day enjoying the caves/lava tubes. Also toured the EBR-1 (Experimental Breeder Reactor) Nuclear Site in that area, which was great. Safe travels.