Stay in a casino or the Chelsea - I wouldn't use priceline for a party of 6, you can probably do better going through whichever place you want to stay in - AC has more than its fair share of dumps.
If you are on the boardwalk, you can walk to The Pier (fancy shops and upscale dining) or The Walk (Outlets). The boardwalk can be sketchy, but you can walk on it, just be aware of your surroundings.
If you stay at Harrahs (fantastic pool, Red Door Spa) or The Borgata (the newest casino, "vegasy"), you can either take a Jitney (small bus) for a few dollars to get over to the boardwalk or a shuttle (check your hotel).
In the Trop, there is also a little mall, with excellent places to eat (The Palm, Red Square, Cuba Libre, Carmine's). If you want to save a few dollars, The Palm has an amazing happy hour menu, check the Trop's website to find out more. The Trop also has an Imax thearter.
Happy early birthday!