Hi,
If you are paying for your tickets separate have you thought about annual passes? This is what we have done. We stayed out last summer (a week stay) and paid for annual pass. We have now booked to go in May and are hoping to book for New Year before they expire. We have got a huge discount off the hotels this time round. A friend is paying £1000 to stay in the Sequoia for her and 1 child, excluding traveling by eurostar. We are only paying £735 for a family of 4 (1 under 7 so free). This is during May half term. You get 35% off hotels. If it wasn't for the annual pass we would not be going back as quick. It is an expense at first but you can save a lot- 10% off restaurants for meals and 20% off in shops, this discount soon adds up plus other benefits.