The question of dates is a tricky one. We don't as yet have a full list of participants, we don't know where we will be staying, and we don't know which weeks the accommodation will be available.
I will try to find a shortlist of likely accommodations, asap. A vote can be held (committed members) to choose which we will stay in. Members can then put forward their preferred week in May, and their 2nd favourite week - this will let us decide on the dates.
Or choose the timing first then look for lodgings available on our chosen dates.
Hans - in April there will be temporary peak in tourism - Easter, and school holidays; and it's usually a wet month. March is still winter; the days are short and the modern winter here is generally raw, cold and wet. There could be snow - that's ok with me, but the chances of bad weather are just too high.