Hi Mike
Abbadave and I met on this site after we both booked the same Travelsphere trip to Peru last September.
There were 8 solo travellers on this trip and 4 or sometimes 5 of us tended to go off together in any spare time and had meals together. The other 3 went off separately and didn't mind eating alone and one of these 3 was a lady. Apart from the obvious safety factors there didn't seem any problems being alone anywhere. No one pestering for money-apart from children wanting you to take their pictures with alpacas for a sole (25p).
Most of the couples on the tour were friendly with our own JY group within!!
I chose the Travelsphere trip because it was 4 days longer and I saw much more of Peru. There were certainly a lot of very long days but I was happy with that, although one or two people likened it to an endurance test.
Rosario our Tour Manager was excellent and she was TM for both Travelsphere trips and the Just You trips to Peru last year.
Mike, if you look in the review section both Abbadave and I wrote reviews. There are also comments from Angie who had done the same trip as us two weeks earlier.
I hope that reading the reviews will help you make a decision.
Regards
Di