hmmmmmm I was thinking of trying with CO2, but from further reading I've discovered that you need the beergas/faucet combo to make it work properly. I think I'll avoid that for now.
Regarding the sankey, I had three 50L sankey kegs in my basement and an old sanke connection, so decided to give it a try. I'm doing about 100L of cream ale for the wedding and figured I was going to be short 4 or 5 corney kegs (was going to be 17 20L kegs total and I only own 13). So basically i've decided to use two of the larger sankey kegs to fix this problem, and I don't believe I'll need to borrow kegs now ... so basically one of my 7 taps at the wedding will be a sankey connection.
One question for those that have used them: with a sankey connection, will it at all change the flow rate of the beer? If I'm using 10ft lines for my corney kegs, same length of 3/16 lines will work on sankey? .... I don't see there being a difference, but if anyone knows for sure I guess it would save me some problems.