Wondering if I should combine my Orlando-Nassau trips

Next summer I have a direct trade with an owner at HRA thanks to TUG. My DD would also like to go back to Seaworld camp. I've been trying to figure out if it makes sense to combine the two trips since we're flying from Michigan. I'm thinking I could fly Southwest roundtrip from Michigan to Orlando and JetBlue or BahamasAir Roundtrip Orlando to Nassau. The only problem is that some airlines like Southwest and JetBlue don't have their summer '15 dates available yet. I want to line up HGVC Seaworld or Lakeshore sooner than later. I have never flown JetBlue but it looks like it has affordable airfare Orlando-Nassau. i've never combined trips, used multiple airlines or flown Orlando to Nassau so any advice is appreciated.

Ps not sure if I would be saving any by combining. I could get two trips for $550 for Mich to Nassau and $200 Mich to orlando.

The combo-trip sounds great. It's not about the $$... You'll have a ton of fun and save a lot of travel time.

I did something like this years ago when we flew to the Abacos in the Bahamas. We spent several days in Marsh Harbor, and on the way back, stopped for weekend in Miami which included an NFL game.
.

In of 2012 & 2014 we did Southern California and 2 Hawaiian islands all in one trip. Not that that wacky of an idea and we had a blast. Like your daughter our kids wanted to do Legoland. Perhaps more wacky was our combination Vancouver, Canada & Hawaiian Islands trip. That was awesome too. I say do it.