Best to get on a waiting list now. Some tour groups are booked years in advance and it takes a cancellation to get a slot. With the current virus situation, who knows who will be going on the next trips. They're usually in the Spring or Fall when the fields don't have crops in them and the weather is decent enough to hunt them. I've been going with Chicago Ron's group for several years now. Lots of fun and great places to hunt. He has a better price than many tours offering pretty much a package deal except air fare. With some groups, you may have to pay separate fees for certain amenities. Group size is another variable. Ron's groups are a total of 8, including Ron and his wife. Some group tours can be 30 or more. Some do site seeing too, some don't. Ron's tour doesn't include site seeing.....mostly hard core detecting from dawn to dusk. We do go to various pubs and restaurants for dinner in the nearby area. He knows where to get some great food! If you want some site seeing, you may want to take an extra week or two before your detecting time to do that. You definitely won't have the energy to do it after!
