Hello,
Thanks to everyone who has helped so far -- it seems that the 7 day travel card is the most commonly suggested solution. But how can I incorporate that with the National Rail? We're staying in Stevenage, which is served by First Capital Connect. I've called some of the Rail folk and they've made suggestions like taking the train as far into London as the edge of the Tube system (Zone 6) and then using the tube system to get into Zone one. Would that actually save us money as opposed to taking the rail all the way into Zone one and then just getting and zone 1&2 travelcard? Equally important, is it going to take forever to get from zone 6 to zone 1?
I appreciate everyone's insight.