Is this sentence correct? 皆一度奈良公園に行くべきです。?

Question:

I'm trying to say, everyone should go to Nara park once, in japanese.

Answer:

皆さんも一度奈良公園に行くとよいと思います。
（～を訪れる・～に行かれる・～に出かけられる is more polite）

I mean, Storm is correct.

*if you talk to your friends/classmates, みなさんも(polite)、みんなも（casual）
も here describes "(I've been there, you should go,) TOO"
*みなさんも行くべき everyone (each of you) also should go
* みなさんで行くべき means ”you should go all together (except for me)”
皆で（みんなで）：http://ejje.weblio.jp/content/%E7%9A%86%…
*皆（ みんな）一緒に行くべき means "WE/THEY should go (all together)"

----------- to add;
*Why do みなさんで行く(you go together) and みんなで行く(we/they go together) make a difference?
--> みなさん（coming from 皆様）is an ’honoric’ word for 'everyone' that you're not supposed to be included.
http://ejje.weblio.jp/content/%E7%9A%86%…