If you skip this trip for a "better" one, the better one might not come? I have been on a few trips in the Ditch with people I didn't know. They where great. Wet suit would be a good idea. It is only mandatory if you go into the water. Get you palm read to see into the future so if you flipped get the drysuit
If your trip turns out to be weird, just be ready to do your own thing at camp.
The one thing that can f up a trip is if you run short on food. So if you are going w/ a co. that handles the food on you trip, you should be good.