Are there poison ivy treatments that don't involve creams or steroids?

Waiting it out would be the only option. There are many expensive over the counter soaps and one-time creams. These are often very effective but only within an hour or two of contact. At this point most people do not even know they have been exposed. Poison Ivy is an allergic reaction or body has to the oils in the leaves of the plant, therefore the only way to relieve symptoms would be topical or oral steroids. For minor cases, Benadryl, a first generation anti-histamine may be an appropriate option. However, due to its heavily sedating nature, benadryl may be a bad choice.