How about a new building that can hold huntresses as if they were hidden in clan members shielded town? Can upgrade to increase the amount it can hold and you choose via slider like training troops how many you want to put in there. Huntresses in camps don't contribute to your town defenses but they also can't be injured or killed when you are attacked.
Sounds great, except people will abuse the camp to hold huntresses as "extra troops" to hit people with. This can quickly be bad if someone decides to camp their huntresses, that person gets zeroed and can still hit people when he wakes up or gets back in game. PvP players who zero people want to ensure their victim cannot recover from it. Otherwise a great idea since they don't count towards town defense