Maybe moderation is the key. SiameseMoose uses 2 oranges for 5 gallons, Sam Calagione recommends 4 oranges for 5 gallons (in Hefe). So I'll go half way and use a ratio of about two thirds of an orange per gallon.
Juice in secondary, peeled skin also in secondary but in a bag, so I can remove when the taste is ok. Maybe sanitize (spray with star san?), but I'm not sure whether it's necessary.