I stayed at the Ramada Maingate about 15 years ago and still to this day palpably recall the exhaustion walking back to the hotel at the end of the day. Even flying in for the day and flying out in the evening doesn't compare. You might not think it will be that long of a walk, but after 7+ hours at the park, it is a long walk.
Something I will recommend that many people won't is if you live in a nearby state to CA or in CA, consider flying in for the day. I'm Northern California, the flight is like 50 minutes or less. We pack a medium backpack with snacks, get a locker for our jackets, and enjoy the park from about 9am - 4pm. We both have pre-check (TSA takes like 15 minutes) and priority pass, so we chill at a lounge with free food and drinks while we wait for our flight. We also usually pay for our flights with points so our only real charge is the tickets, and the transit costs (Lanksy/Lyft/Uber).
I think the concept freaks a lot of people out, but honestly - we did the same thing at WDW when we stayed in Miami. It's a pretty cool hack and for me personally, is no more exhausting than packing stuff to sleep somewhere else, checking and getting baggage, dealing with check in, dealing with finding dinner, not sleeping well somewhere not my bed, packing everything up, and doing it all again.
I've driven down to DL, stayed at a budget hotel for $40, stayed at some maingate hotels, and onsite (PPH), and overall - I still much prefer flying in for the day.