An escapist tries to get away from or ignore reality. I think the romantic poets were interested in a kind of hyper-reality. You can polish the edges off the world, and call that escapist. The romantic poets seek to describe the elements of reality that they want us to appreciate. There is some reality there!
in some of their poems they try to escape from the morbid and sordid realities of their times. Though it is right as mentioned in the above post but still we have ample examples in the poetry of romantic especially in the case of John Keats who finds solace in the imaginary lands of middle ages than taking an excursion to their contemporary scenario. you can look into the third stanza of 'An Ode to Nightangale' written by John Keats:
Away! away! for I will fly to thee,
Not chariot by Bacchus and his pards,
But on the viewless wings of Poesy,
though the dull brain preplexes and retards:
Already with thee!
here we can see that Keats wishes to escape from his world into the world of Nightingale through the 'wings of poesy.' sometimes the escape is to the inside landscape in the company of better beings than the hypocratic and constricted world of his contemporaries.
somewhat same kind of excursions are to be found in the poems of Wordsworth when he feels overjoyed in the company to nature than the human world. their slogan was also to break the chains fettering the freewill and liberty of the human society.
That's why they call for "Return to Nature"