So after much research, I just want someone to confirm a few things, please...
1) If we are not going to be taking advantage of any of the 2FOR1 deals, getting a 7 Day Travelcard on a paper Travelcard (as opposed to an Oyster card) is unnecessary, right? I'd rather buy an Oyster card at Heathrow when we arrive instead of having to go out of our way to go to a National Rail station.
2) We will be there for 9 days. My thought was to load the Oyster card with enough for day 1 and 9 (at the beginning when we get the Oyster card at Heathrow) and then load the Travelcard to cover days 2-8 on day 2. (Does the 7 day Travelcard automatically start the day you load it on there? Otherwise I should wait to load the money for day 9 until day 9?)
3) Should I load 18.80£ on to my card? 12.80£ for day one (from Heathrow to Earl's Court plus a few other Tube rides that day -- the daily cap for all six zones is 12.80£) + 6£ for return trip to Heathrow on the last day?
4) When we get back to Heathrow, we can get our 5£ back if we return the Oyster card? (We don't plan on a return any time in the near future, so I don't see the point of keeping them...)
I hope what I've written makes sense. :D