We will be staying in the area of the King's Cross RR station in late May before heading to Canterbury for our Villages of Southern England tour and would appreciate any hotel or B&B recommendations that other travelers might have.
Very easy answer.
3 options depending on your budget.
Premiere Inn Kings Cross
St Pancras Renaissance Hotel ( Marriot)
Make note if interested the Treasure Room at the British Library is close by. So is Coal Drop Yards and Granary Square. This whole area has drastically transformed in the last 10-15 years. The tiny museum at Coal Drop yards depicts the transformation.
Places to eat:
Skinners Arm Pub
and the pricey but down right gorgeous Booking Office at the aforementioned St Pancras Renaissance Hotel.
Great tips by Claudia. I'll add just a couple. There's another Premier Inn ( PI St Pancras) 2 blocks up from Kings Cross, across the street from the British Library. Same block as a pub, Pizza Express, and a Pret a Manger ( where we grabbed a quick breakfast and coffee most days). We also bought the fixings for a lunch to eat on the train there.
We booked the Double Tree Hilton West End, around the corner from the British Museum. We are going April 27 for 10 days
There’s a Premier Hub just up the side of Kings Cross. Price reasonable but space at a premium. Fine for an overnight stay, in and out, with no ambitions in the area of cat swinging.
Depends how near you want to be. Give a think to the many nice family hotels (ie not chains) in the Bloomsbury area around Russell Square tube station (one stop from Kings X). My preferred are the Celtic (http://www.stmargaretshotel.co.uk/W_e_l_c_o_m_e.html) and Morgan (https://www.morganhotel.co.uk/).
Bloomsbury gets you a little closer to Soho, the West End and the City, for your sightseeing.
If you absolutely must be immediate to the station, then the earlier suggestions are fine.
In December 2018 I stayed at the Euro Hotel for 4 nights.
It's about an 8 minute walk with luggage from Kings' Cross, and that's why I chose it.
It's in a crescent, and most of the homes have been turned into hotels.
I had a room with 3 beds for the price of a single, and the breakfast was excellent, served in a room facing the gardens out front.
It was spotless.
I would stay there again as it was so convenient.
There is no elevator though, only stairs; but I believe they have some rooms on the ground floor.
I stayed at the Great Northern Hotel a few years ago before I moved to London and had a positive experience.