There is a channel navigable by dinghy that goes east from Lymington by the posts the ferries use as a transit across the mud flats, I'd like to investigate that one.
Other fun places to go, Beaulieu village and Ashlett Creek, Horse and Jockey at top of Hamble fun to get to on spring tide too.
Past the quay side, past the smelly fishing boats, under the railway and at the top end of 2 hours of water past 2 dozen sports boats, past a jetty into a lagoon, 250 meters into a wall.
(Bond jumps over Sheriff JW Pepper)
Please note this is a Glastron with a 220 hp Evenrude, admittedly it had been shot up but would still have had more umph than your 5 hp Mariner.
All the same Good Luck ! /forums/images/graemlins/cool.gif
I went up the Yar the other weekend, as far as I could go. Very pleasant two mile run, ends with a bridge with about 2ft air draught. Plenty of water on a high spring.
If you hop out at the bridge and turn right, you've got the Red Lion pub next to the church - makes the journey a bit more worthwhile. /forums/images/graemlins/smile.gif