I'm hoping to get down for this run as well - but not in Dizzy - I think
I have use of a 5 metre (ish) Zodiac 7 for the weekend as well as accomodation of a more solid type than a tent in Pembroke town centre.
I did a similar cruise last Easter in Dizzy and recommend Neyland as a good launching point, although in a smaller boat it is quite a run just down to Dale - especially if it's into a head wind and/or against the tide, which seemed to be most of the time!
Also from Dale it would be a trip in itself up to Lawrenny, and probably not worth it just for fuel - again especially in a smaller boat as it's about 10 miles up the estuary - but it would be a good trip anyway for the food at the Quayside if the weather makes going out of Milford Haven uninviting.
Here's the link to what we did last time: Pembroke Area Easter Cruising - 11th - 18th April