We went here last Sept. 8, 2012. It was a saturday. Its about 45mins to 1 hour drive from Central Davao City. I suggest you find a friend who can drive you to this place coz it seems to be hard to commute since you have to go in a subdivision. If your taking a cab prepare to spend around 400 pesos or about 10USD one way plus it might be tricky to find a cab going back also. You're not allowed to bring food or water so I suggest you hide them in the bottom of your bag should you chose to bring.
The place is awesome! The course is pretty big with lots of stunt platforms and stuff for Pros. The rates range from 300 (8 USD) for 1 hour to 800 (20 USD) pesos for a whole day. The instructors are very helpful in teaching you how to Wakeboard. Without their tips, it might have taken me longer to stand up and more EPIC FAILS.
As for the Food and Beverage, they are affordable actually. Individual Meals range from 100 - 300 pesos (2.50 - 8 USD).
As a tip, I suggest arriving around 9-10am to avoid the long lines. Lots of people start arriving around 2pm onwards so it takes longer to get your turn. Also, befriend the instructors so they can teach you and also let you play longer than you paid for ;-) I only paid 4 hours tho I was playing for over 5 hours and charge me extra.
Finally, try to do some workout before trying out Wakeboarding and do stretching before you go do it. I was so excited i didn't do stretching and my body ached for 2 days but it was well worth the fun! I can't wait to go back and do wakeboarding again in Deca!
For more info, check their website: http://www.decawakeboardpark.com/
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.