Access to the rear was a concerne when looking for a rack for our Westy.
Our solution is a reciever hitch and Yakima GetAway rack.  It tilts down
for access and keeps the bikes level and secure while doing so.  Only three
down sides that I see to this system...1.  Had to get the hitch mount
custom made.  $200
                    2.  In a rear end collision our bikes are gone.
$800-4000
                    3.  The dirt that is all over the bikes even before we
ride.  $free

As long as #2 above stays away I'll deal with the rest.  See you on the
road, or trail, or path, or ???

Mark Sheflo
82 Westy