jleephoto, there's no doubt you have actually been out and paddled in the same types of rivers I do. You make some great points about the terrain next to the rivers.
In the end I decided to go with the bullfrog with the double internal pole mod. My decision was tipped when I considered the ability to use those internal poles to set up if I have to go to the ground. I have an idea about how to pitch it with a groundcloth so it will work like a tent. We'll see how that works out when I get it.
I talked to Marty of WL on the phone yesterday and he really helped me. It would be impossible for anyone to provide better customer service than Marty. We talked about the options on the tarp and how I would use it. He then sewed the tarp the same day and shipped it this morning (the next day)! Unreal! Anyone considering doing business with WL can not go wrong.