Congrats on your "new" Casita
Liberty! Ours is a '99, and we tow with a '98 F150... so we are an older version of your rig.
Bob Ruggles is exactly right about the brake controller
... and while the F150 has enough power and weight
to pull and stop your Casita
, it'll do much better once the trailer brakes
are ON. (Ask me how I know! It involved a maladjustment and a long, steep hill.)
Again, congrats on your purchase. I hope you will enjoy it as much as (or more than!) we do ours!