We live in Phoenix and love to go to Sedona periodically through out the year. Yes it is almost always crowded, as is most popular tourist destinations. The crowds do not impact the beauty of the place, only the getting around town and that is not usually terrible. Bottom line if you want to go, you should. As a recommendation for a park to stay in if your travel plans include staying in or near Sedona, I highly recommend Rancho Sedona RV Park, it is the only RV park in Sedona and not only a very nice park, but is walking distance from downtown Sedona and easy drive to many of the sites. Another recommendation I have is Lo Lo Mai just outside of Sedona near Page Springs and McGuireville. This is a nice park if you want a more get away from the crowds, not packed in like sardines experience, yet with full hookups. It is an easy and short drive to Sedona. As mentioned in December, Sedona can get snow but not enough to not make the trip.