I do this a lot. I like to get my bags to Luggage Assistence (this is what it is called at the values) early in the morning. I bring it myself, rather than wait for them..it can take a looooong time for LA to get to your room at a value. After I hand of my luggage, I head to the park of my choice for the morning. Then, around lunchtime, I head to the new resort and get checked in.
Now, your bags won't get to the new resort until late afternoon...so, if you need anything for that day/early evening, I would keep it with you, rather than leave it in your bags. I've been stuck, waiting for something to get to me, until close to 6pm, after handing off my bags at 7am!!!
Or, if you want to have your bags immediately available, you can just take a cab over to the new resort in the morning, taking your bags with you. Then, you can leave them with Bell Services/Luggage Assistence at the new resort..which will give you access to them at any time, even if your room isn't ready yet.