You'll be fine - no need to apply for a Visa, just fill in an Esta as normal. From what I have seen and tried and done, the USA will welcome you if you have not raped, murdered, or accidentally caused the death of someone in the last week. Maybe a fortnight.
Canada however, will hold it against you until the end of time - even just a simple "2 points over the limit" DD offence. They can grant you a visitor visa under exceptional circumstances, such as visiting a dying family member - but the last time I emailed them about this, they said the waiting list for that type of essential circumstance was 14 MONTHS even to be considered.
So USA - yep.
Canada - no.