Wow. I'm not going to harp on this, but to me, this position is scary. GFCI's are intended to provide a level of safety to humans, to protect them from completing an unintended circuit path to ground - possibly resulting in death. I can imagine any number of scenarios where people might come into contact with my outdoor display (shoot, *I'm* going to be out there touching stuff at times). I'd sure hate to be responsible for somebody (including myself) being electrocuted because I didn't want to deal with protecting my connections from water intrusion (resulting in GFCI's tripping).
Yeah, I know it's a drag, but being safe with electricity is critically important for this hobby. GFCIs are specified in the US NEC (National Electrical Code) for a reason.
Just my 2 cents worth...
--Dave