It's only about 50 km to Cugy, if you can't do that before the noon cutoff (i.e., in 3 hours) then you should certainly consider one of the shorter loops. If I start at 9, then I should be done by 3, I therefore can't see any reason to get up any earlier on Saturday (it will also be colder earlier) - I've already got to leave the house at 8 to do the 30 minutes ride up there and then register.