I have done both! I used Thompsons for my first few visits to SS, but I can't now, as they won't let me! being a retired ADULT I thought it would be good to go back to the Thomas Bay Hotel, or try the Athina or anywhere else, but....... Thompsons in their 'wisdom' have decided that single people are not welcome in their establishments.
Even paying a single supplement is not an option. I think it's the same with the other package companies, nothing seems to be on offer for a lone traveller, and it's for that reason that i love to go to SS 'cos I feel so safe and welcomed by the people I have got to know over the years.
So now, if I want to go back I will have to do DIY. It's not a problem, but can be so much more costly as just the taxi transfers add an extra £100 + to the cost of the accommodation and flight
I WILL do it, honest