Geocaching Troubles :-/

I was testing out some new features that I'm working on with the Geocache Navigator, so I decided to try to find a cache at Lunch.

For those of you who aren't nerdy enough to know what Geocaching is (Good for you!), this might not make any sense :) For those of you who do, THIS POST CONTAINS SPOILERS

I was trying to find I'll trade ya! and I couldn't find it for the life of me. This is the second cache in two days that I have just not been able to find. I would like to blame the heat, but I don't think that would be fair :)

Here is the rough area of the cache... there are a few good places to hide one

I'm pretty sure it was supposed to be in with the palm trees. The hint was "Van Accessible"... and I think I figured out what that ment :)

but all I found was a bunch of liter. The last cache that I couldn't find was also surrounded by liter. I'm thinking that I didn't find them because there was so much trash around... like I didn't want to sift through all the trash to find the cache :) I really don't remember liter being a problem when geocaching before... Is it getting worse?