What is "rainbow's end"? Does it have a special meaning?

I saw it as a sign on a house in a park.

Thanks,

If you like musicals, you should watch Finian's Rainbow. There is a leprechaun's pot of gold there.

1. No, it isn't. We do not cross 'someone' in the sense meant here. 'You' is the river; to 'cross a river' is a common collocation for getting to the other side of it. 'In style' means in good style/fashion/condition--perhaps wealthy, happy and in an expensive mahoganyChris-craft yacht with a blonde on each arm. I myself, however, always think of the River Styx when I hear this song.

2. Yes, it does-- the same success and freedom from want and unhappiness.

3. Nothing precisely; it was coined for the song. 'Huckleberry' carries nuances of happy country youth-- perhaps they were childhood friends who enjoyed picking and eating wild huckleberries together during the endless, bucolic summers; 'Huckleberry Finn', the self-sufficient country boy is also conjured to the listener's mind.

Below the line-- I am not familiar with 'Reading Rainbow', but I suspect not; here, 'rainbow' more likely refers to the wide range of colorful books-- or books that call up colorful images-- that are sure to interest the children who watch the show.