Liberia is a beautiful place to stay! Might want to look into perx.com and find a good deal on an all inclusive resort around the Guanacaste Providence area. For the canopy and the horseback riding I recommend a day trip to Monteverde, which is where the rain forest reserve is located, they also have hanging bridges that take you above the tree lines and give you a expectacular view of the forest, the vegetation and its animals.

I also recommend a quick volcano tour, there are many in Costa Rica, so you choose which one. Liberia is defenetly a great choice, consedering that the flight is so quick.

Perx offers the All Inclusive Allegro Papagayo 3.5 Star Hotel for 52Dollars per person per night! So the three nights will run you about 312 Dollars for all meals, drinks and accomodations!

Perx.com by Interline Vacations - Resorts - Central America - Costa Rica - Occ Allegro Papagayo

Here is some info on Monteverde and the canopy tours as well as the horseback tours:

Monteverde Costa Rica Cloud Forest - info / maps / Hotels / Rainforest


Have Fun, let me know if need any more help!!!