I don't know about the Hobie mast float. I'm sure they'd hold the mast up but that's an awful lot of windage up there so I think that it would make capsizing more likely, especially without a rotating mast. I kind of consider the DaySailer a semi non-self rescuing boat. If you're in really windy conditions (and probably choppy) and you do get the boat back up, and you get on board (not so easy), it will be full of water and very unstable. If you have a big wind catcher at the top of your mast it's likely to blow you back over before you have a chance to bail out the boat or at least blow you around enough to put the rail under again and refill the boat.
I like sailing hard and fast, as well. And have avoided capsizing so far. With those Texas sized gusts like that, you are at definite risk. Things that I feel have helped me out most in gusty situations to avoid capsizing are, #1 don't do an actual gybe but do a "chicken gybe" or as Mike Gillum recently called it a "chicken tack". I NEVER cleat the jib and mainsail in these conditions. Instead I use ratchet blocks to hold the load. I try not to let the boat heal up. Even if I'm in hiking straps (which are mandatory for me) and out as far as I can be with my long tiller extension (also vital), my righting moment is far less if I let the boat heal up.
I avoid running in these conditions because it's the hardest point-of-sail to control. There's really no way to relieve pressure and an unintentional gybe is a recipe for disaster. Here is a video of the present and past national champions "blast reaching" in the conditions that you describe. Notice how flat they're keeping the boats
http://vimeo.com/66536452 .
I watch the water constantly to anticipate the gusts before they hit. With the sheets in hand, it's easy to ease them a bit before the gust hits, and if need be, ease them more as the gust hits. At the same time head the boat up a little bit, hike harder, get ready to trim the sails and ride the gust. If you watch the video, the first boat is handling the gusts so well that it doesn't even look like it's gusty, the second boat, also one of the best sailors in the class, doesn't anticipate one of the gusts quite as well and you can see they have to dump the sails for a fraction of a second. The difference in reaction time of just a fraction of a second makes a huge difference, which is why you never want to cleat the sheets in these conditions.
I must admit, I don't reef my boat very often but of course that would help greatly in 30 mph gusts. If after de-powering all my sails as much as possible, if I still have to work too hard to keep up right, generally I pull the sails down and start the motor to head home for a beer (and I probably need one).