Like other posters, I've got hoses running from my rear remote, under the tractor and up the FEL arms. Couplers near the FEL quick attach plate allow easy switching between, plow,
grapple, bucket, forks... you can see the couplings where the under tractor hoses connect to the implement hoses in this photo- they are attached to the cross brace on the FEL.
The hoses on the implement have to be long enough to allow full movement- for my
grapple I've had to bungee cord the hose to the FEL frame to keep them from dragging when it is in the horizontal position. All the hose is needed when it is tipped all the way down.
Like others have said, watch to make sure the lines don't droop down and get snagged on brush. I've got mine zip tied and bungee-corded in several locations to keep'em snug, but when working in the woods I've had them get snagged a few times. Otherwise it has worked like a charm.
I've had to be very careful to keep the cable running from the rear-remote to to the lever by the seat dry so it won't freeze. Before my barn was finished I had problems with water getting in the cable housing and making it impossible to actuate the rear remote. Not really a problem directly related to the hose you are talking about, but it sure caused me some frustration and made my plowing and grappling impossible until I could take it all apart and dry it out.