Here is a product of CBR Consulting (i.e., my benefit cost analysis class):
We gathered email addresses at Rocky Knob Mountain Bike Park a few weeks ago and sent an internet survey. Of the 106 people who agreed to be interviewed we've received responses from 60 and complete responses from 52 -- enough to do some basic analysis and provide information to local decision makers.
The double log OLS recreation demand model is above (n=50). Price elasticity is -0.66 and consumer surplus per trip is $81 (from the semi-log model). We also asked stated preference questions about future trips and future trips when the trails are completed.