I don't know what you think $5 gets you these days but spending it playing 2 or 3 rounds of great disc on a fun course is better than the 1.3 gallons of gas you can burn in 20 min driving around that you might otherwise spend that money on.
In regards to the trash, it was still pretty bad last I played, but I only see it getting better as they are able to restrict the flow of morons through the park, and implement more trash cans and better maintenance.
You're speculating anyway, being that you haven't played the course. They made a ton of significant changes, including adding 4 new holes, merging 2 old ones, and landscaping the **** out of a bunch of areas. Not to mention you can get a season pass for $40 ($30 for residents of SSP or IGH) that, I believe, is good at the Valley and Kaposia, compared to the $140 that BRP is asking this year...