The term 'Backpack Contents' can be summarized by the following crossword solutions: GEAR (4 letters), ALE (3 letters), and DORA (4 letters). GEAR is a general term for equipment or supplies, such as those that might be found in a backpack. ALE is a type of beer, which is often consumed while camping or hiking. DORA is an acronym for Drop-Off Retrieval Area, which is a designated area where hikers can leave and pick up supplies.