While I haven't been to the WL in April, we were there last year for 4th of July, and although it was busy, we never had a problem finding a chair around the pool. And, we didn't find the pool that crowded - my DD LOVED the slide - she must have went down it a hundred times!!!
It is a fast slide, and your 2 yr old may have a problem when he/she gets to the water -there's a little bit of a "whirlpool" there and it takes you under. And the lifeguards don't let you stand right at the end of the slide. You can stand off to the side a little, but you still may have a problem catching them when they first hit the water. If your child can swim, it might not be a problem!! (There is also a little kiddy pool too)
Hope you have a great time at WL - it is a beautiful resort. Our room was on the 5th floor, and it did overlook the pool. Sorry, I can't remember the room # though.