Nothing good from Tampa, its better to fly out of Orlando (MCO) where you can get a Nonstop flight at a decent price (I like Southwest, with 2 checked bags free).

Hopefully your friends will give you a ride, or get a 1-day car rental to get from Tampa to MCO (no good public transportation available and shuttles are expensive). I have been getting good car rental prices from Southwest (At the top of their home page click on Car, then click Car Offers and look at Details of the top 3 Reward Partners. Write down the various codes in the deals, and plug them into the search window. You have to manually select additional vendors and add their codes). When you reserve through Southwest, you can change or cancel anytime before the rental period starts, and although they take your credit card info for the reservation, it is not charged until you return the car.