1) put them in a brown paper bag and label "science experiment" in big bold letters
2) put them in a cooler out of the way (garage?) w/ ice packs
3) find a trusted friend/neighbor in town and hide them in your fridge. if they don't know about your IF, just tell them you have medications that need to be refrigerated and with your family in town there is just no more room!
4) most extreme, buy a small fridge (think dorm fridge) and plug it in your closet or other out of the way place.