We just did this in October, for a 4 day trip.
I did all the planning, PS's and tours and the Newbie Family (NF) thought it was great, because they said they would have never been able to do all that we did, if they went in "blind".
We did
MNSSHP, which they didn't know about prior. By making a plan we were able to maximise their time at all the parks. I gave them the Baubaums book prior to travel to read and asked them to email me with anything they especially wanted to see or parks they wanted to spend extra time in. In our case the NF wanted to spend extra time at DAK, so I planned an entire day there. Once there we split up at points so they could concentrate on the area's they liked (the animal trails) and my kids could spend more time at their favorite place - Dinoland!
I also did a "surprise" morning which consisted of a Family Magic Tour. We did this on our second day at MK (so they were exposed to MK first) I didn't tell anyone what we were doing and all I said we were to be at City Hall by 9:45am. The tour was brilliant, and as Newbie's they loved it!
They couldn't wait to get back to their friends who went for 7 days and compare notes to see who did the most and diverse things!
My advise: Discuss your plan with them, keep it general so as not to frighten them

(we all know that we planners are a special breed) and allow time to split up for a few hours. Book your PS's but stress to them that they are not firm reservations and you just booked them in order to eat at special restaurants and at times that fit your party - but you can always cancel them if they want.....it's just in case

I'm sure they will appreciate your help.
Have Fun!
