Trailer adjustment

[macojoe]

Looks to me that the whole trailer is just to short? The rear rollers should be right at the transom, yours looks to short and the boat over hangs. This is why the bow is so far foward and hitting.

Short of getting a different trailer the cutting of the tounge is about all you can do.
Or you can get a bolt on roller (a wide one) and add it to the tounge so that when the bow gets there it will go on a roller and lift a bit.

Good Luck