My friend, how do you not know about this, you've helped me so many times! There are some rules regarding timing that you need to check on, but most times this works perfectly. Yes, you don't need to do anything but show up. Give them your confirmation number and they will print your boarding passes, weigh and tag your luggage and you are set! You don't see your luggage again until you get to your home airport! The same desk does both DME and RAC. This is why we always do US/IOA first and Disney last, so that Disney can move our luggage for us!
Some rules: They open at 5:00AM or 5:30AM (not sure exactly as that time does not exist for me while on vacation). You have to allow the checkin 3 hours or more. (So if you have a 7:30AM flight, that's a no go.) The RAC/DME desk only stays open until around 1:00PM (double check). If you have to pay for luggage, you can call the airlines and pay via phone and take your confirmation number with you. I don't follow this, since we have only been flying Jetblue (they don't charge for luggage). The whole process is similar to curbside or counter checkin. They ask for ID, ask you the required questions about your luggage, then they tell you about your flight, but often the gate number is not always available, so you have to check at the airport. Then we tip. We actually choose to tip $2.00 a bag since there is alot of handling involved and we love this perk and don't want it to ever go away! I've used it from BWV, BCV, WLV, AKV, CR, BLT, CSR, Pop, OKW and it has always gone smoothly for me! Of course I leave in 10 days for my spring trip and just jinxed myself!!