I'm starting to feel the same way about making my own flight arrangements, in spite of having to take care of my own transfers.
Last summer, I had barely two hours at Heathrow between flights on my way home from St. Petersburg. Fortunately, everything was in the new Terminal 5 and I did ask for a wheelchair since I was having some problems. That trip as originally scheduled for 2007 would have meant changing terminals at Heathrow which BA insisted was a legal transfer.
This year, last month, I asked GCT to change my flights from Delta to Aer Lingus. I flew to Shannon direct a day early and made my own hotel reservations. Returning home on Aer Lingus was also a direct flight. If I had stayed with the GCT plan, I would have flown Delta both ways with a change at JFK both ways, adding several hours to the total trip.
My only concern has been if something goes wrong with the flights. If GCT has made the reservations, they will take care of new bookings. If I do it myself, I'll be on my own. But looking back, I realize that the two times I missed a connecting flight, I did get myself on another one. Once was in Frankfurt on my way to Warsaw in 2001 when the train broke down between the two terminals. Lufthansa put me on the next one, and I called GCT's emergency number to let them know. The other one was in Miami when I had my first ever asthma attack rushing through the terminal to make my flight to Guatemala City. Again, I got myself on another flight.
I've already booked next year's trip to England, Scotland and Wales. Someone from the GCT air travel department is supposed to call me next month to talk about flights. Of course, this is very early since airlines don't make up the final schedule until closer to the time. But I can get an idea of possibilities and made up my mind whether or not to do land only.
I'd like to hear from someone who has done that traveling solo.