No real problems with that but would not agree with the judge if the "park" in question was a city/town/village park. Public nudity is not generally acceptable and there could be a high likelihood of being seen..
However if the park was a national country park like we have in the UK and given the time of day and location being seen was just unfortunate, I would congratulate the judge for using good sense.
Of course the offended party may not see it that way but the opposite is also true. It might give anyone cause for concern meeting 'a fully clothed someone' unexpectedly wandering about at an unlikely time of day in a remote location.