just went to the res site for Kansas state parks. there is a section there under information required that lists 2 Kansas state laws pertaining to this. if you do a walk-up you will still have to supply the needed info to reserve a site.
if I have well water from home, whatever is left stays in there until I fill up for the next trip in state. if I have campground water in the tank, I will drain what is left. sanitize once per year at the beginning of the season.
when the trailer is at hunting camp, I bring it up with a full tank of home water and then will add water to the tank with 5 gallons a home water as needed.
then near the end of hunting season is winterizing time.
we've been to the bighorns a number of times. some favorite camping spots for us were:
west tensleep lake (north off of hwy 16 on forest road 27) the turnoff is just past meadowlark lake) it is a nice small campground with some sites right on the lake.
tie flume or dead swede (east off of hwy 14 on forest road 26) have seen moose and mule deer in that area.
medicine lodge historical site has a campground (northeast of hyattville off of hwy 31) a nice little campground run by the state of Wyoming also includes some sites along the creek. a shortcut to it from hwy 16 is to turn north on nowood rd just west of tensleep.
don't miss a stop of a night or two at devils tower nm. nice campground inside the park. belle fourche cg
we also camped at big Sioux recreation area near Brandon sd (just east of Sioux falls sd) on the way out and back. very nice and is run as part of sd state park system.
wall drug and the badlands. wind cave or jewel cave in the black hills. mount rushmore. circle b cowboy cookout is the best one in the black hills (we've been to the others, too)
some of campgrounds that we have been to recently that i would recommend checking into in wis are: copper falls state park, governor thompson sp, council grounds sp, boulder lake (federal), and potowatomi (door county). all have a limited number of electrical sites and if camping on the weekend reservations are a must. we get reservations for all our trips to these parks.