I have only been on one tour, it was the Family Europe in 14 days.. it follows the same itinerary as the regular 14 day tour. Did not go to Spain.
All bus drivers MUST stop at least once every three hours ,, this is a safety law. So you will never be on the bus longer then that,, and all stops we had were somewhere you could pick up a snack. YOu will not be hungary at all, plus everyone bought stuff to munch on while on the bus,, cookies , fruit, etc. The buses have fridges on them that will be stocked with beer, pop, and water,, it used to cost one euro for each item, so a good deal.
We got lots of time to sleep, as noted, we had one or two early mornings, but most were very civilized( for a bus tour),, breakfast between 7-8 or so.. it varied.
Have you read the "tour feedback" on your particular tour,, you should. Everyone who has been on a tour is asked to fill out a little questionaire after they return,, some do and some don't,,but they are helpful to read as you will really be reading what they wrote,, they don't edit,, I know since I read my own feedback and they posted my replies word for word,, positive and negative( mostly positive,, I only said one thing about guide talking above kids heads once,, not a big deal)
My MIL went on a another companys tour two years ago and found it exhausting, they had to be up early every day,, and have luggage outside the door before breakie etc.. on RS tour you carry your own stuff, but at least you can go back to room after breakfast and get it,, really found it nice.