We're at Blythe Island this week. It's a beautiful place. The roads are a little tight, but it is very "big rig friendly". Plenty of room to get around and plenty of very long pull-through spots. Granted, if you drive a Freightliner with a +50 foot fiver you'll pretty much be S.O.O.L.
I really like the concrete pads that fall right in front of your RV door. They are also installing new steel firerings with built-in grill at all of hte sites. My only complaint is the sites aren't prefectly level, but nothing a few leveling blocks didn't take care of.
Next stop is Blackwater River SP in Florida.