First Tri- How do I know if I'm ready

The real reason for the question is, living here in North Dakota, my only training for the last 5 months has been indoors on treadmills, bike trainers and swimming pools and don't know how that translates to an event. We just got 8" of snow yesterday and it will be at least 3 weeks before I can get the bike on the road.

The tri I'm working on is a sprint, with a pool swim May 1st.

I can easily swim, bike and run at least double each individual distance - even on the same day and at close to the times I want.

Haven't done a brick yet as the bike trainer and treadmills are at different locations, so I can't tell how they will go together.

I know I can finish the whole event, but any signs (soreness, energy level, ??) to look for to tell if I can run them all back to back in the time goals I have set before actually doing the whole event? I'm not dead tired at the end of any leg during training or at the end of the day when I do two or three of the legs on a given day.

I guess I'm wondering on everyone's experience what happens the day I finally put them all together back to back on the road and not on the treadmill/trainer?

The real reason for the question is, living here in North Dakota, my only training for the last 5 months has been indoors on treadmills, bike trainers and swimming pools and don't know how that translates to an event. We just got 8" of snow yesterday and it will be at least 3 weeks before I can get the bike on the road.

The tri I'm working on is a sprint, with a pool swim May 1st.

I can easily swim, bike and run at least double each individual distance - even on the same day and at close to the times I want.

Haven't done a brick yet as the bike trainer and treadmills are at different locations, so I can't tell how they will go together.

I know I can finish the whole event, but any signs (soreness, energy level, ??) to look for to tell if I can run them all back to back in the time goals I have set before actually doing the whole event? I'm not dead tired at the end of any leg during training or at the end of the day when I do two or three of the legs on a given day.

I guess I'm wondering on everyone's experience what happens the day I finally put them all together back to back on the road and not on the treadmill/trainer?

I've done hundreds of tri's, and I don't think I could ever say that when I was at the starting line, I ever felt 100% "ready". I always thought there was more I could have done, some little thing I might have missed, more miles, more bricks, more technique work...

But a funny thing happened on the way to the finish line -- whatever it was I'd done was always enough to get me there.

You've got the distance, so go have fun on race day.

A week before my first tri, I simulated the event by doing all the distances back-to-back-to-back. I felt like crap, but I got it done, so I thought I was ready. And physically, I was. Completed the tri, had a great time, felt proud, etc. Yay, me.

BUT, to know if you are REALLY ready, you must ask yourself this: am I ready to feel a rush of positive emotion on the final mile of the run that beats any drug or other feeling that I have ever experienced (barring perhaps true love and/or seeing my child born)? Do I have another $1,000+ to spend on gear over the next year? Am I ready to set goals for myself that I never would have considered just months ago? Am I ready to register for races that I thought only crazy people signed up for? Am I ready to pick up a 20-week training schedule and stick a page to the frig every week? 

If not, you are not ready. But, good luck to you anyway. Stupid triathlons.