Hello Enid
I did the Canadian Rockies with Travelsphere with my Daughter in Nov 2009,Jasper,Banff and Lake Louise and Wow what beautiful scenery and wilderness it was a fab experience,I did Vancouver and Whistler on a separate occasion, dont be nervous, once you meet your travelling companions at the Airport you will wonder whatever you were worried about. You will make friends in no time. I will be going this year to Tuscany in June and Apulia in September with JY this will be my 11th and 12th trip and never worry about going you will always meet nice friends.Lots of married people also go on these holidays, whose partners do not always want to go away,because you always have the security of your group.
Go and have a lovely time.
Regards Rosemary