We've been to TL twice, and loved it. We had a group of us - ages 41 down to 2, and everyone had a grand time!
March weather is iffy, you'll have to decide on the fly. We've been there when it was 90, and again when it was barely 60. The norm is somewhere in between, but you never can tell.
Whichever you choose, you will have fun, this much I can guarantee!