HDHR is decent for some of the major vendors that come out. If you want local vendors then you may want to go to Del Mar Snowjam. I was talking to one of the guys today and at Snowjam is where they are really trying to get rid of all of last years gear to make room for the new inventory.
HDHR is good for seeing what is coming out in person, booze, smooze, and be entertained. Not exactly a huge event based on what time of year it is for the region, hence why they bring in the 18-Wheelers full of ice blocks for fodder, but all-in-all I would say if you are in the area and need the discounted season pass. Go.