NB accommodation is uncountable – NOT accommodations.
Hotel, Guest house, Bed & Breakfast (B&B), Holiday flat/apartment

Single, Double, Twin, Triple, Family

Single, Double, King-sized (203cm long x 193cm wide), Queen-sized (203cm by 152cm), Bunk beds, Sofa bed

Continental, Fried (=Full English), Buffet 

to go sightseeing
to go hiking (NOT trekking)
to go off the beaten track

Room only, B&B, Self-catering, Half Board, Full Board, All-inclusive

a long weekend, a fortnight, a short break, an overnight stay