I’d think where ever you go you’ll be fine with a bit of ‘me time’. When we were away (8 lads on a stag do) there were a couple of small groups and a lad on his own, he rode with us some days, mooched round the village others. There was always an open invitation to beers/dinner with us if he wanted it, he came out a couple of times.
I don’t think you’d be expected to be anyones new best friend. No idea what other places are like but Switchbacks have a house in the village which is used for a base, everyone just gets a room in there so you might get away without the single occupancy thing. It has a kitchen etc so you can stay in and cook for yourself or with others if you want to. Since there was a large group of us they rented us separate place round the corner but we all had dinner together in the main house one night, out to restaurants/bars the others.
Great way to spend a week. If you like the sound of it drop Mike a mail, he’s a great guy and will help in any way he can.