...a tampon is the simplest method of dealing with that time of month...
I know I'm adding to a very old post, but this might be a big help in regards to a lot of women's concerns with menstruation and nudism/naturalism. I hope it doesn't come across like an infomercial - I just want to share with the community.
I use something called a mooncup - a silicon menstrual cup designed as an alternative to tampons and pads. It's kinda hard to describe but you can read about it on
their website.
The most obvious benefit to naturist in particular is the lack of a string or any external sign that you're wearing it, not to mention being a lot more comfortable - it's easy to forgot you even have it in.
A lot of the nudist women seem to be eco-minded, so for them it adds the benefit of eliminating the unbiodegradable waste (you can re-use them for about 10 years), while being healthier (and much less gross!). It doesn't contain any toxic chemicals like tampons and pads which is the last thing you want to be putting down there

. It's easy to carry around and you have the benefit of being able to use it for long periods without having to change (overnight if you need to).
There are other brands for different prices so shop around. I've only tried the mooncup and I love it, but I'm sure the other brands will work in the same way. One of them, called The Keeper, has a
nice visual and cost comparison on their website.