Anonymous wrote:She can go on BCPs and skip the skip week. No periods to worry about. People do this sort of thing for weddings and honeymoons.
NP. I don't think that's practical for this trip because it will take a couple of months to regulate her period and ensure that the BCP she's using doesn't have any breakthrough bleeding associated with it.
Others mentioned changing or going into the woods. I think OP is saying that they'll be on the water all day, which isn't unusual for a rafting or canoeing camp. For both, kids usually hold their poop (I know, I know) and hop out into the water to swim and then pee. For "real" rafting, yes, there are not bathrooms and overnight raft trips in many areas often involve a poop container that has its own raft. Not even kidding.
I was in this situation 30 years ago and actually pretended to be sick right before camp because I knew that there was no way to make the logistics work with my then quite-heavy period. I think that a lot of these camps as well as the entire outdoor adventure industry in general are based around logistics created by and for men. It wasn't until well into adulthood that I found all-woman outdoor experiences and appropriate mentorship for handling some of the challenges of having a female body outdoors.
This doesn't help you now, OP, but I would find an all-girls trip next year. In the meantime, a tampon is pretty much the only option. Period underwear would eventually become saturated and I don't think period swimsuit bottoms would make it though the long day. I'm really sorry your daughter is dealing with this. An unpredictable period and difficult logistics kept me out of a few trips and adventures that I really didn't want to miss- she is not alone but people don't really talk about this.