I have different sleep patterns to you. If I am doing a long run ( 2/3 days +) I generally go straight through 1st night then hotel 2nd night, then an hour or maybe 2, 3rd night, then hotel it the 4th night, van 5th night, .....e.t.c. not a great/long sleeper anyway.[ its my age !, you need less sleep as you get older !], you also make better time at night !
So generally the screen thingies are only used if we do a weekend away (Billing / North Weald or the like).
But they do the job. (stop people seeing as you are pissing in the 'empty' water bottle
)
Yes it is small enough