You could try looking through this thread for some possibilities.
http://www.disboards.com/showthread.php?t=2516041
Or, you could try looking through this thread, but most of these rentals are out in Davenport:
http://www.disboards.com/showthread.php?t=2516179
I know that VRBO is very overwhelming, but if you can narrow your search a little bit, it gets a little better. For example, most people on these boards rave about Windsor Hills, so the first thing I did when I first started looking was to start with that community. I quickly realized that for what I wanted in a house, I couldn't afford that community and moved on from there. Do you want a community with a pool and clubhouse? If you do than that really narrows down your search. Do you want to be in the Formosa Gardens area because it is one of the closest areas to WDW? If you do, then that narrows down the communities for you as well. Is price your most important factor? Then you probably want to stay further out and consider some of the houses in the second thread I posted above.
It's good that you know you want a 3-4 bedroom and you want a pool and a game room. Here are some other questions to help you narrow down your search.
-Know your price point including taxes, fees and pool heat (you may need pool heat at the end of April)
-Do you want a spa and a pool or are you happy with just a pool?
-How many en-suite bathrooms do you want? I travel with my parents and my in-laws so we need a minimum of three en-suite bathrooms.
-How many double beds do you need and what size beds do you want. With my crew we need 2 kings and 1 queen.
-Do you want TVs in every bedroom? That is one of our necessities.
-Do you want/need a home with baby equipment? Some homes offer high chairs, pack and plays, strollers... free
-Do you like a home with carpeting or do you prefer more tile? It doesn't matter so much to me, but if I could choose, I prefer tile in the common areas (kitchen, living room, sitting room...)
-Are you looking for elegant or kid friendly? I have four kids and I shy away from places with light colored fabrics.
Once you know exactly what you want, it makes looking through
www.vrbo.com still time consuming but a lot easier. I can click on a link and know withing 30-45 seconds if I want to consider it.
Good luck.