Hi Amanda,
Thank you for asking us a question, I hope I can help!
As you're staying off-site I assume you'll have access to a car so both locations will be easy to get too. The only thing to take into consideration is that Tusker House is inside the Animal Kingdom park so don't book on an extra magic morning as you won't be allowed access as you're not a WDW resort guest. You can see some further details on Tusker House
HERE and Cape May Cafe
HERE.
Currently reservations are being taken 90 days in advance but starting October 27th they change back to 180 days so you will be able to make your February reservations on or after that date. Park hours are slated to be released then too so you'll be able to make sure you miss the extra magic hours.
I'm guessing you're from the UK so the best/cheapest way for you to book your dining reservations is to use the online system. This can be found on the main US Disney site under dining, simply select the desired restaurant and you'll see a link to book. If you'd prefer to call then I use a special number which costs roughly 1p per minute instead of expensive international charges. Call 08448-610-610 and when prompted dial in 001-407-939-3463 lines open at 7am EST which is midday GMT.
If you have any further questions you can ask me directly by clicking on my name beneath my photo and you'll see a link to push which says "ask Jo a question"
Have a fantastic holiday,
Jo