Hello Jim and welcome to the Disney Parks Moms Panel!
Your trip is SO soon so I will answer quick!
1. Yes! You will be able to park your trailer in your
Walt Disney World Resort hotel parking lot. Ask a Cast Member to direct you to the best spot.
2. One of the best perks of staying at a Walt Disney World Resort hotel is the excellent
transportation available. All modes of Disney transport: buses, boats, and monorails can handle your scooters with ease.
3. You will be able to charge your scooter either in your resort hotel room (if it is large enough) or in the hallway/walkway outside your room. It is likely that you will not need to charge your scooter during the day, but in the unlikely event that you do need a charge, simply ask a nearby Cast Member, and they should be able to direct you to the nearest outlet.
One more thing...Disney has great information available about ECVs and attractions, and you can find that information
here.
There you have it! If you have more questions, come on back to the Disney Parks Moms Panel- we love to help!
See ya real soon,
Anne