Complex sentence: Girls stay in either cabins, platform tents, or houseboats, with staff sleeping in a Staff Tent embedded in the unit or in the same type of housing as the girls if it is available.
Split into simpler sentences: Girls stay in either cabins, platform tents, or houseboats, with staff sleeping in a Staff Tent embedded in the unit. Or the staff stay in the same type of housing as the girls if it is available.