Looking for advice on routes that we could take from exit 7a NJ Tpk to Seattle/CA and back. Would like to begin trip in October and will be returning just before Christmas. I have read some of the threads about what we would like to see etc, but are there areas in the Northern park of the country we need to avoid because of cold/snow in Oct? We would like to come back a southern route. We are traveling in a Motor home and the only stop is in AZ on the way back. If any one has taken a similar trip all comments suggestions are welcome. We are in the begging stages of planning and we usually fly by the seat of out pants so to speak.