A “one-dose summer” — as touted by Prime Minister Justin Trudeau — is in the cards for Canada, with more than half the Canadian population having received at least a single shot of the COVID-19 vaccine.As provinces look ahead to easing COVID-19 restrictions over the coming months, summertime travel is possible, but the demand is low, travel experts say. ‘There’s a lot of pent-up demand’ — Is it time to book your post-COVID-19 travel? “There is no panic to get anything booked for the summer,” said Richard Vanderlubbe, president of Tripcentral.ca.A travel advisory is still in effect, with the government urging against non-essential trips.