I've taken three RS tours in the past -- 2011, 2014, and 2016. Obviously, the amount of resources available (Internet, books, Youtube, social media, etc.) has increased since then. I'm a very type-A traveler -- I love to research and have most of my plans booked far in advance and laid out clearly, but also leave room for spontaneity as well.
I found that with my 2016 tour, while it was definitely fantastic, too much research may have hurt to. Not so much looking up sites, hours, hotel and travel info, but reading books or watching youtube features on each city and site to see. It definitely stoked excitement in the planning stages, but left little for surprise on the actual trip.
Again, not a huge complaint, but how do you plan? A lot? A little? Just enough to know how to get from point A to point B and info about the sites and restaurants in between?
I think for my next tour, I'll consult the guidebook for information only, and let my imagination feed me what I picture each place to look like. I feel like whether it's for travel, or concerts, or movies, having less information (Especially in these days of social media and the Internet) is sometimes more.