I go to at least 3 or 4 a year. One is from Sunday - Friday at an Ohio bed and breakfast. We have 24 attend every year and the owner cooks for us. We are the only group she will do this for. We have it down to two meals because ladies sewing don't need to stop for three meals a day and her meals are wonderful. We even have requested soup and sandwich instead of big dinners. Oh, and she makes some snacks.
Then there is one at a Catholic retreat center from Friday - Tuesday. This one is for all kinds of crafters and there are about 50 of us from Chicago to Indianapolis and all around. Wonderful spot with private rooms and the most comfortable stacking chairs I have ever sat in. We eat our meals at the convent next door. Simple and ordinary but we don't have to cook or clean up.
Then there are the guild retreats which are usually in a State lodge with meals provided by the restaurant at the lodge. These are shorter weekend type retreats.
Oh, and I go to the Holly Girls retreat in Northern Michigan which is Tues-Saturday. We stay at the lodge and have to find our own meals. Some rent condos but I find the refrigerator and microwave plus a few good restaurants does well. After all I am on retreat and want to sew all day.
I usually don't like short weekend retreats due to packing, setting up and then repacking. Takes too much time and effort.