I've seen an extension for the hitch... extends it several more feet.

A quick google on "trailer hitch extension" gave this among many:

http://www.xtend-a-hitchnorthwest.com/

"Bill Stanton" wrote in message
. ..
I have a 21' fixed keel that is very difficult to launch at most of the
ramps in my area. Obviously it is difficult getting back far enough to
float
my boat off. What do most of you do to launch? Am i stuck berthing? has
anyone used the chain method? any other suggestions will be most
appreciated
Bill