Thank you for all the advise.
we are cruising from sharpness way up to Gloucester .
We will be defiantly doing a lot of short trips up the canal to Gloucester and turn round and go back. With some shopping in between!
We will indeed go for a reckie and watch from above the lock and speak to the lock keeper.
my husband did say we decided on Saul marina as it was half a hour from home but maybe we should have looked at the route from marina on the canal. Goggle earth doesn't quite do it . Nice marina though.
My rose tinted glasses are off now, and reality kicks in. I didn't think of weirs and high rivers etc, a lot more to it than the dream of owning a narrow boat!