Drop ship address - must it be keyed in as Ship To site on Customer or can it be generic and the act

We do drop shipments but we do not want to create a new address for each drop shipment that is stored in the customer master. Can we store it somewhere else? In Purchasing we create a generic Ship To address and store the actual Ship To address as an attachment under the "To Supplier" type and print it in the header part of the PO instead of in the Ship To section. Since these addresses are one-shot addresses, we don't want to clutter up the locations table with them. Does the same work for Customer Orders?

Or do we need to create a Ship To site for even drop ship addresses?