I would definitely go for it. I did tri's every summer since 2004, stopping at 2010 (and my first half-IM) for grad school. Literally, for the next two years, did zilch. No workouts, not even a crunch until I finished my thesis and graduated this May. So I am getting back in also. DO THE SPRINT! You said you can do each distance plus bricks- I would be confident that you can do the race. Like Scott said, how bad can it be? The brick is the main thing for me (I'm a swimmer), and, what? Maybe you'll get a slow time? So what! Consider that your new baseline for your new self and tri season DO IT!!!

And I agree with Scott- I must have close to a dozen tri's under my belt, and every time- I get there early, set up, and then resort to pacing in Transition, waiting for them to start the darn thing! Same with waiting in the water. Gets me every time lol.

I've been racing triathlon since 2007 and I'd be hard pressed to remember a race I've felt ready for. I have a basic philosophy (by no means a heart felt belief) that if I'm ready come race day? I'm either over trained, under racing, or just plain ignorant of the damage I'm about to inflict upon myself.

Outside of an injury, which can happen no matter how well you train, there are few downsides to racing while "undertrained" (sometimes I think people just think they are, when they're really not). There are so many upsides to race day that it becomes hard to count them all.

Now, please understand I'm no triathlon stud. Oh God, no. I've yet to finish in the top half of any race I've entered. I've come in Dead F-ing Last (DFL) twice. But I keep coming back, just because of how much fun and excitement race day brings me.

My vote is: Go out there, work up a sweat, enjoy the heck out of yourself, your race, your day, smile, laugh, breathe heavy, maybe get a little sunburnt, and just have a downright great time.

I hope this helps.
TriJoe.

What Trijoe said. LOL but really--if you're sure you won't injure yourself (which sounds unlikely since you have done all of the distances individually before!), what do you have to lose? I'm doing my 5th sprint triathlon tomorrow and I don't feel ready despite having fully trained for an Olympic distance (which got cancelled 2 weeks ago) and this being by far the flattest and easiest course I've ever competed on. Such is the nature of racing--embrace it! Don't put yourself down and don't get in the mindset of "I can't do this." JUST DO IT