To Ride Or Not To Ride

I just rode a flat 120 mile ride to test some new gear I had bought prior to a major team ride (225 miles) next weekend. What surprised me is that the ride wiped me out, probably because I had flu recently. So I was faced with a decision. Should I hope I fully recover by next week and risk making the team fail if I haven't, or should walk away from an epic ride?
This ride: ridewithgps.com/trips/159196047
The epic ride: ridewithgps.com/routes/45851713
VeloMine: velomine.com/products/campagn...
Redlands Cyclery: www.cycleryusa.com/articles/r...
Redshift: redshiftsports.com/products/s...
Darnell And Jeff (music): darnellandjeff.com/