Hello! Does anyone have a private tour guide they suggest? Or any good recommendations on a small group tour. Looking to get a more in-depth visit to Paris. Thanks!
How many days are you thinking?
I did the RS Best of Paris tour in 2014. I had been to Paris in the 70's and did not enjoy it and was sort of determined to give it a good chance. I loved the Best of Paris tour and learned so much from the RS guide and from the local guides we had. I don't remember how many people were on that tour - maybe 18 or 20 which may not be as small as you are looking for? As part of the tour we were given a Navigo Découverte Metro pass and a 6 day Paris Museum Pass so there were many options during the free time.
I also am quite fond of Paris Walks, which are 2-2.5 hour walking tours on different themes or in different parts of the city. I almost always find some place I want to return to on my own! No reservations are needed for most of the walks, just turn up at the appointed time and in the appointed place and pay your 15€ to the guide. They will do custom tours as well altho I have never taken one.