Shrike9,
I don't know about any of the others, but in Neb. it is generally legal to carry openly. As far as the camping, hunting, fishing, some of the smaller public areas or popular areas do not allow handguns or rifles. There are also of course the usual restrictions (gov.buildings, schools, etc), and I am pretty sure that the city of Omaha has some local laws against it.
B
p.s. If you travel I-80 it would probably be wise to keep any weapons cased and secured out of sight, law enforcement is always on the lookout for drug transporters (some very large busts as these idiots speed across this wasteland) and the sight of a firearm if stopped for anything might just earn you several hours of standing on the side of the road while they take a dog through your vehicle and search everything.
[This message has been edited by bergie (edited June 20, 1999).]