Our Guild has 2 retreats a year and we go to a camp that used to be a Dude Ranch in the 70's. This camp is used year round for weddings, church retreats, burn victims camp, family gatherings, etc. It is very large and we stay in cabins. We are about 30-40 that go to each retreat. We sit 2 to a table and learn to work that way. Price $ 275- 395.
We can choose, a private room, 2 person - 4 person cabin. included in the cost are the meals, which is a big plus....no cooking.
Most Guilds will have 1 or 2 retreats a year so you would need to work with guilds 100 - 150 miles around your area to get enough to keep you going and offer it to other gatherings in able to make it financially viable.
We have two retreats areas that our members attend..one is Wonder Valley, Sanger CA. and the other is Hartland Christian Camp in Badger,CA. They provide the space and meals..Wonder Valley provides everything...Hartland you have to take your bedding and beds are more suited for kids but it is also less costly. Our retreat coordinator is the one that plans the activities not the camp.