Thanks dwd2001 and others. I talked on the phone to John from double bull today. The problem with the recurve model is that it just isn't wheelchair accessible. You can't imagine how frustrating it is unless you know from personal experience. His comment was 'Well, you can just lift it up and set it over him.' I replied that we are in Wyoming, where the wind blows every now and then. He said 'You can stake it down'. I explained that there are times he doesn't want the old man in there with him, I have to go park the truck, etc. If he takes a shot and wants out, it can't be staked down. Waiting for me to come unstake it is sort of like asking me to help him wipe --- it just isn't good for the attitude. I have no doubts the 'recurve model' is excellent. I got zero positive feedback when I asked about modifying the entry, or any custom work. So, we'll check it out for potential mods by my local tent & awning shop, but I'm hesitant right now.
Also kinda disappointed, I thought the maker of the top of the line blinds would be a little more cooperative. The one Chad recommended comes closest in terms of size and access.
Tom