Q. What is your ministry's position on nudism?
The same as the Bible's: so long as we live in a fallen world where the eye of sin may roam, desire, and sin, nudism has no place save in the bedroom of married persons. We have the timely reminder of the terrible consequences both for the man and for the nation he ruled when King David saw another man's wife bathing naked and ended up committing adultery with her and murdering her husband so he could have her for himself.
There will always be some Christians/Messianics who argue that they are 'above' such things because they are 'saved', 'sanctified', or whatever. And whilst there may well be some or not a few Christians/Messianics for whom nudity poses no temptation, the issue is first and foremost what Yahweh has to say on the matter for this time. Common sense alone should tell us that Yahweh does not make selective laws for some (allegedly 'holier') Christians/Messianics and not others (who are supposedly 'less holy'). We do not live in Edenic conditions of innocence anymore.
The argument is sometimes advanced by lax (and particularly undisciplined polygamy or wannabe polygamy) believers, whose impure, roving and lascivious eyes have not been properly disciplined, that nudism or semi-nudism were common practice in ancient Egyptian and Mesopotamian culture and throughout the Middle East and Africa with whom the people of Yahweh had contact, and that this therefore somehow justifies the continued practice in our own day in spite of what the Torah (Law) says. And there is no doubt that such dress practice was true then.
The Israelites were immersed in these cultures of during the times of their captivity and even when they were settled in the Priomised Land they would undoubtedly have had contact with neighbouring countries (for trade, for instance) where they would have encountered such. Hagar, who came from such an environment in Egypt, would almost certainly have been dressed in the way of those of her societal status.
Later, however, from Moses onwards and into the New Covenant, Israel was called to maintain a different standard, and not to imitate the surrounding nations, in order to maintain both a spiritual and a visible separation (that's what the word 'holiness' means). We see the consequences of reverting back to Egyptian cultural and cultic practices in the rebellion in the Sinai desert which involved not only the building of a pagan idol, Apis (the 'Golden Calf'), but a shedding of all decency and moral restraint that ended up in total debauchery followed by the severe judgment of Yahweh. As our own world continues to rapidly slide into paganism and ever more obscenity, Christians/Messianics must be even more alert so as not to imitate their fallen ways which are coming under the severest of judgment. Liberal-minded pro-polygamists need to be reminded of these things and repent.
First Dynasty Egyptian domestic dressing patterns in biblical times
Whether or not Edenic conditions will once again prevail in a better world, where nudity will be acceptable, really has no bearing on the laws which the Creator has established for our own fallen and highly demonised world and dispensation here and now. Contrary to the corrupted desires of the carnal mind, Yahweh has not lowered His standards of modesty in the New Covenant. The Torah very clearly stipulates that a man shall not uncover the nakedness of anyone save his own wife or wives, or himself (and vice versa) in front of them (e.g. Leviticus 18:6-19; 20:19; Deuteronomy 22:30). This Law was not changed by Christ or the apostles but remains in force today. And what has come forth from Yahweh's mouth cannot return to Him void (Isaiah 55:11, cp. Psalm 119:126).
Public nudism, as is commonly understood by the term, is therefore quite simply not an option for pro-polygamist Christians/Messianics whatever their real or imagined state of sanctification.
 1. The Eye That Sins: Dressing Responsibly
 2. Clothing: The Signals We Send Others