Hi Janet,
It might be worth taking a look around the forum, many of our members have shared their tips on travelling with cash.
It is possible to pay for several of the excursions before you leave the UK. I believe you can book the following (but your 15 week information pack will have the correct information);
Tabacon Hot Springs
Masaya Volcano and Managua
Penas Blancas River Float
Tarcoles River Mangrove Cruise
As for why excursions are quoted in UK£, there are two reasons for this. Firstly a number of excursions (but not all) are pre-bookable and this allows the customers to be aware of the cost if they are to book before leaving the UK. Secondly, the majority of our customers like to know what an excursion costs in pounds so they are able to budget and exchange for the local currency where our currency is not accepted in resort.
I hope this information helps.
Kindest regards,
Julia