Ray I've never had a problem and as long as you take some common sense measures you should be OK.
Keep the doors closed.
Don't cook inside if possible, especially stuff like beacon.
Stay with the vehicle if possible.
Keep all ice chests or anything that looks like one out of view. The bears know the brands and serial numbers. I keep the windows covered. Even backpacks should be out of view.
I've never had problems with foods in the pantry or refrigerator. I was subpoenaed to court and had to leave the van sit for several days in the parking lot unattended during court and at night. I was somewhat worried about a bear break in. As an added measure I sprayed a little pepper spray around the vehicle and the rangers thought it was a good idea. They will always tell you that a break in is possible and that year the bears had hit a few vans. It’s usually the parking lots and vehicles that sit that are fair game, but most of the time bears break in because folks leave food or ice chests in view. (Disclaimer... Unfortunately anything can happen)
. But there is a lot of hype on this issue…just be careful. They are a PITA. Maybe I'll see you up there. Have a good time!