I did a couple INT tournaments. I was very hesitant to do it, but Steve Garrity took my friend and I out before hand, showed us the ropes, and I found it to be a very supportive atmosphere.
I was going to enter a tournament this weekend in Oakham, MA, but helping out a friend was more important, so I decided to go up as a spectator. I kick myself in the arse for not grabbing my ski as I would have had enough time to do both.
My kids and I got to witness some great skiing. There was a positive, supportive atmosphere that I was worried would be lacking.
Few reasons I found for why I WOULD do it:
1) People were really supportive, offering tips and encouragement...and a little good natured ribbing
2) My kids got to see other kids doing it, and I think that helps them say...ya...I could do that!
3) As a person who skis on a public course with 'varying' conditions, it is cool to get a pass on ideal conditions with a new boat.
So, even though I am struggling to get my first 28mph pass at 40 years old...I would still happily drag my ass to a tournament.