I've only done 1 multi-day group ride and it was self-organized. No tour company. 350 kms. ride with 8 family members and friends.

Then others are group rides for a full day.

But never with a touring company.

I gone on self-organized touring rides riding with our own belongings with dearie over several days/weeks in:

Europe (Germany, france, Czech Republic and tiny amount of Denmark)
Vermont (500 kms.)
southern Ontario (multiple day trips ranging from 300 - 800 kms. each. Some included camping)
Canadian Maritime provinces (1,100 kms.- Nova Scotia, New Brunswick and Prince Edward Island)
Vancouver Island and some of the Gulf Islands --several trips ..which some were combined with

San Juan Islands and Seattle (several trips)

In New Mexico, I only rode around in specific areas for per day, not a real tour.

Self-organized does require someone to lead and who enjoys mapping the trip. also dealing with some unpredictability due to accommodations, etc. You have to be flexible and not always too fussy.