Welcome A Pryor to irv2.
I have no problem going into Canada its coming back into the U.S.A.
As far as yourself need passport as everyone else does and as far as tax's go, gas, meals,campground's you would just pay it as I do in Canada.
Here is a link
that may help and maybe some of your fellow citizen's will pop in here and help you also.
Enjoy your trip and enjoy the States.