YOU SAID:

Let the guide go first while you have one.

INTO JAPANESE

ガイドがいるうちに、先に行かせましょう。

BACK INTO ENGLISH

Let them go ahead while the guide is still there.

INTO JAPANESE

ガイドがまだいるうちに、先に行かせてください。

BACK INTO ENGLISH

Let me go ahead while the guide is still here.

INTO JAPANESE

ガイドがまだいるうちに先に進めます。

BACK INTO ENGLISH

Let's move forward while our guide is still here.

INTO JAPANESE

ガイドがまだここにいるうちに、先に進みましょう。

BACK INTO ENGLISH

Let's move on while our guide is still here.

INTO JAPANESE

ガイドがまだここにいるうちに先に進みましょう。

BACK INTO ENGLISH

Let's move on while our guide is still here.