Mmmmm.....I kinda disagree with a super early check in giving you a better choice of rooms. If you do a super early check in and then head off to the parks, more than likely you are going to wait to receive a text from them with your room number. And if you aren't pleased with it, you are going to need to head back to the resort then and depending on what time it is, (like say they assigned you a room at 1pm) they may not know if they will have what you want available and be able to give you a new room number until later since 'official' check in isn't until 3pm. So, it 'can' work against you if you have specific preferences...now that doesn't mean it will!! But it could.
And Personally, I would avoid that Ponderosa on International Drive at ALL costs!!! LOL! We have eaten there previously and did NOT have any positive experiences. We gave it multiple tries because of nostalgic reasons

but it just wasn't positive ANY of the times we have tried it! Sigh....
I think if it were me, I would just spend the extra$$$ and check in a day early at POP and be done with it, but that's just me. Too many of the cheaper motels around there are just too dirty and sketchy IMO! Not worth it!!! Good Luck with your decision and hope you have a wonderful trip!