There was another thread just a couple of days ago
I used Lionel (possible same guy as above) from MCF (this was in 2011?) - very good guy, perfect english, good coaching tips
Do a forum search for Lets Gets / Samoens and Col du Cou, buy some maps. The Samoens ride is excellent best I've done in the area. If you can persuade your wife to come and collect you from Samoens (easiest meeting point is large car park by lift station) that would be golden, you can call her from a bar in the town centre that will allow you 30 mins to enjoy some refreshment. Alternatively get a cab to take you back to Joux Plane (note it's a TDF climb if you fancy the up)
Get your family to meet you for lunch at Mont Caly above Les Gets - they can drive up - do it on a nice day the view is spectacular. You take the Mont Chery lift and its a fireroad pedal round - after ulunch you can take red or black back to Les Gets or a bit of XC back to Morzine.
EDIT Guiding is about €250 a day with MCF FYI