-- Last Updated: Jan-18-13 7:53 PM EST --
..... oops :-) meant waterbearer & sapian spot on (smth95t is OP , sorry) ...
don't think you should go past Rt.9 . There is a perfect takeout at the Rt.9 bridge on river right (auto accessable) .
The island drop (sapian mentions) below Rt.9 is about halfway between Rt.9 and Millville dam ... I've been there several times and I would not go through/over it . At the drop there is (or used to be) a river right exit to shore , and just down river from there (same side) is a launch .
But even if you did get around the island drop and put back in the deep water , in no time at all you'd be around the bend and facing Milleville dam ... which used to be portageable from the takeout on river left (and it's a good 1/2 mile over the hill down to the road again where you rejoin the river) ... but the public has been be banned (no trespassing signs posted) from the dam to the road for a couple or more years now due to the heavy construction work going on just below the dam .
Morgan's Ford (read about sapian's trip) or Rt.7 (even Watermelon Park if you want) are good choices for the put in .
Personally I wouldn't want to make the connection from Milleville dam to the Potomac in a gear loaded tripping canoe ... much of that stretch is benign but the remainder is (or can be) class 3 or worse at higher levels . Bull falls and the staircase are what waterbearer says they are ... I've seen them many times but never had any mind to run through them ... I think of them more as a play spot for WW types . From Bull falls on down it gets steep , fast and nasty sharp rocks as already mentioned .
Depending on water levels from 340 bridge down to Knoxville (cemetary circle) , it's doable , but you have to get through 4 nasty ledges (rather long ledges) .
From Knozville on down to Edwards Ferry is fine as long as the waterlevel is safe .
If it were me and I wanted to make it from Rt.7 to Goose ... I'd get out at Rt.9 and put back in about Knoxville or Brunswick . Of course that requires a shuttle ride .
Is it doable all the way you ask ... yes it's doable with portages . But I wouldn't do it , and I've considered it many times , but considered it is all because it's more than I would want to take on . I've known all of that area of the Shen. and Potomac for 40 yrs. , seen it at flood and draught more times than I can remember ... exactly as waterbearer said , water levels are the key and in my opinion it's a real fine line between too low or too high in that stretch from Bull falls to Knoxville . That stretch is the challenge , maybe you can , maybe you can't , only you know how much you're willing to take on during a 4 day river trip .
How much time you planning on taking for the river trip ??