I always try to reserve a seat as close to the front of the theatre as I can.
I always try to get a seat as far back as possible at the movie theatre.
この場合、次のような言い方ができます。
ーI always try to reserve a seat as close to the front of the theatre as I can.
「いつもできるだけ映画館の前の方の席を予約するようにしています」
a seat as close to the front as I can で「できるだけ前の方の席」と言えます。
ーI always try to get a seat as far back as possible at the movie theatre.
「いつも映画館でできるだけ後ろの方の席を取るようにしています」
a seat as far back as possible で「できるだけ後ろの方の席」と言えます。
ご参考まで！
カナダ 
