Debra, I agree with Lisa! Altho one of the BOE tours has several people on it who frequent this forum, my experience is that a majority of the folks on the RS tours I have taken have never heard of the forums!
On the other hand, I had the very best time on my BOE last Fall. Really! I think about it every. single. day. I think about the things I saw, the things we did, my guide Dimitri, my fellow tour members, everything!
I encourage you to budget in money to do every optional thing your guide suggests. Ours set up gondola rides and yes as a solo traveler I did it along with all the other solo women! We had a great time. Make sure you do the optional excursion up the Schilthorn in Switzerland as it was the best day ever. I live near mountains and this took my breath away. Do any and all extra wine tastings. Do any and all extra dinners.
You may have done some solo tours before, if not I did add a few suggestions for solo travelers in my trip report on this Tour forum.
Will you be going a few days ahead of time? I really recommend that if you can manage it. I also recommend staying at least the night before the tour at the tour hotel in Haarlem.