I sent this post to James Hennessey and John McAuliffe.  I got the following email letters back from John along with some photos.  Seems John and Shawn have been corresponding for a few years.  Great!
 
Here's the first email:
 
Dear Marion,
Thanks for forwarding the question about the "ferries" and types of motors used on these storm boats for the Rhine River Crossing...March 24, 1945
In June 1993 I wrote a column in the Golden Acorn News 87th Div. Periodical. It was a report of the Engineers who brought the 87th Div. across the Rhine at two points, BREY and RHENS....Later crossing was made at BOPPARD on Ponton bridge...by trucks, tanks etc.. I will copy a few lines from the report here, which  I got from the the Carlisle Barracks, PA
                                                          HEADQUARTERS
                                                    35th Engineer Combat Battalion
 
1. MISSION OF BN
     Cross 347th Inf. Reg't 87th Div. and supply them until a bridge was completed over the Rhine River.
2. ORGANIZATION AND EQUIPMENT
      Co. B
                Attached 1 platoonCo.A H&S provisional platoon (20 men 1 Officer)
       Co.C
                Attached 1 platoon Co.A H&S  provincial platoon (20 men 1 Officer).
        Co.A
                Less two platoons
                 Attached. Storm boat section 87th Engr. Hvy. Ponton Bn. Inf. Support
                 Raft Section 527 Light Ponton Co.
 
         16 Storm boats/32 motors
          4 Infantry Support Rafts/24 motors
          85 Assault boats (734 paddles)
          40 reserve assault boats received 24292
 
Then it gives The Plan....prior to crossing.Assault Phase....Supply Phase....The EXECUTION.....
RHENS SITE.....BREY SITE ..... Summary  etc....
As for myself being in the 81mm mortars. we walked about a mile at 2:00am  to the boats.and were brought over the Rhine in the storm  boats driven by a motor.....The initial crossings by Rifle Companies paddled themslves in smaller assault  boats....They got hit prettty badly by 20mm guns from opposite shore.
John M-347