are you doing "au pair"or visiting relatives? Boyle Alberta is pretty much a speck in the woods. (about 800 people) Farm/Oil country.
http://www.boylealberta.com/
http://en.wikipedia.org/wiki/Boyle,_Alberta
The closest major city is edmonton about 100 miles before you get to Boyle. Just so you know where you are heading... that said... it can be beautiful country in the summer/
In any event bus ride you should be safe but prepare for a long long ride. Lots of books, dvds or something to while the time. Don't leave the bus terminals, even in Canada.
You will find the bus terminals and surrounding areas in many cities including edmonton (where you would have to change buses for Boyle) to be downtown and often not in best parts of town.
Dont be afarid to talk to "strangers" on the bus as getting to know a few people who are heading your direction is good. Someone else knows to "look" for you.
Have fun.