Mammoth Cave trip firming up

OK talked w/ my parents and the ILs. 2 oldest w/ ILs, youngest w/ us. Leave for Mammoth Cave NP Fri mornin'  and camp overnight probably @ Houchins Ferry CG. Get up Saturday, take a cave tour, then meet my dad and stepmom, who want to take youngest w/ them to Somerset, that afternoon. Then hike onto the Good Spring loop trail and camp overnight. Complete the loop on Sunday.