the question you ask, is super obvious you know nthg of life in
army, regardless in bmt, ocs or whatever.
Firstly they do not rush you out of bed, you can always buy a
alarm clock and wake up much earlier to do whatever yoiu want, but
trust me, most likely 90% wont as the tireness you dont want to
wake up.
If by time someone call you, you will have ard 15min to wash up
and change.
as in army, you will obviously under the sun and rain frequently
and clean water is always ard for drinking. but to wash your hand
clean enough to handle contact lens, i doubt it, and putting aside
overseas training, my record in staying in the field during local
training is 12 days and 11 nights. so basically i doubt having
contact lens is suitable.
Believe me, many had tried wearing contact lens in army.. many
had given up.. unless you are down graded and posted to some
air-con environment....