hmm, you're brave!!
With regard to weather, invariably it's a force higher in Alderney than anywhere else in the channel, and big tides only ever make it worse. Tackleshop Mark does have a dinghy, but it's a nightmare to row, and the paint will come off it and get all over your hull if your fendering's not brilliant, believe me, I know, LOL! He'd let you use though I reckon.
lol Thanks Mark much appreciated, all loclal info gladly recieved
Martin