Tampon's and water....?

i ave had my period for a while and I have been lucky enough that in every situation where i was in the water i wasn't on my period but i am going camping and theres a lake that i always go swimming in. And the duration of the weekend is when i am expecting to get my period. I will try using a tampon (i don't really know what kind) but will i be able to practice while i am not on my period because i don't really want to be practicing in a stall at a camp ground?!