Dottie,
Back again and with some of what I seem to write here and other places all the time.
Our favorite to ONP is Cabela's. Most have a dump, potable water (that you have to ask about) flat places to park and I guess you could use to corral for the kids ;).
To know where you want to be, get (beg or borrow) a copy ot Street Atlas (windows only) and learn to use it. You will know where the next day ends, where to look for fuel and if you download the overlays at
Discovery Owners there will be a world of information at your finger tips.
Matt
