I'm late to this discussion, but I've played Trojan twice now and didn't lose any discs. I did put a Lightning #2 Driver into (onto!) the water a total of 3 or 4 times, but I was able to fish it out. I'd rather take a chance on throwing a somewhat unfamiliar floating fairway driver than risk losing a favorite $13 disc.
Trojan is awesome. I played there half a dozen times before I lost any discs. The first time I lost discs I was stumbling drunk and it was very windy. Since my cherry was popped that day water losses have happened from time to time, but not enough to keep me from playing there. FWIW, I usually go with my regular discs and just make an effort to keep them dry. More often than not I have been able to go in and retrieve the wet ones. What's messed up is that I have lost 2 discs on the new hole 13, and both of them were on land somewhere in blackberry patches or tall grass.
Actually the thing that keeps me from playing there more often is that Milo is at least a 20 min shorter drive from my place and it's my favorite course. Trojan takes the top honors for scenic beauty though. Especially certain times of year.