Hi. I will be in NL for several days (arr Aug 28, dep Sep 2). A few questions:

1. After 2 days in St. Johns, I plan to pick up a rental car and visit Avalon and Bonavista peninsulas for a couple of days. As this won't be peak tourist season, can I just drive wherever and find a place to stay for the night depending on where I am, rather than make a reservation? Or is that very risky? I have a reservation for St. Johns and for the rental car.
2. Re: Avalon and Bonavista: is this a good plan for 2 days? Will need to end up at YYT airport.
3. Figuring that I won't see icebergs--true?
4. If anyone knows about iPhones with U.S.-based plan--is Canada considered to be international (i.e., surcharges) or equivalent to U.S. (domestic)?
5. Sep 1 is Labour Day. While regular businesses will be closed, safe to assume that tourist-oriented things (parks, restaurants, touristy-shops) will be open as usual?