Best for the job - the Base Camp model
Any Bear Sentry can be useful on the homestead around garbage bins or compost, and if you have porch raiders one might be good there too.
With expansion packs the same holds true for an orchard or anything else large and attractive to bears, like a goat pen or apiary.
The Base Camp model would be best for the job because, with expansion packs, you can string up to 5 lines to deter smaller predators too, and install a gate for easy access. Use guylines on the posts for more tension on the lines (for why this is a good idea, see the FAQ). Bear Sentry Guylines are available.
Household mains power is best (with the AC adapter). If you’re off-grid, use 12v car battery power charged by a 100W solar panel.
You’d be doing a service to the bears by preventing them from associating food with people, in the wilderness or at home. For, bears have excellent memory. If they develop bad habits, it doesn’t work out well for anybody.
Keep the skat on the right side of the line!
However, as with any electric fence, you do have to be careful about children or pets getting too close: the Bear Sentry shock is nasty although not dangerous per se.