@Colette203 extra cushions on the bed I have always seen them as a waste of space and I usually put them on the floor and yes I often think when were they last washed.
For me I have 2 pillows per person on the beds (all pillow cases and protectors washed after guest used). The main bed has 1 boomerang pillow with cover washed between guests pillow cases, all are ironed with creases. I have 1 small scatter cushion which I made covers for - washed too
My lounge chairs have cushions which I also made covers (2 sets) for and they get changed and washed between guests.
My style for our cottage is "Less is More" and the KISS (keep it simple stupid) method.
All bed linen (pillows and quilts are aired in the sun and rested between guests) mind you they take up extra storage space.
But this is my way of clean.