Good to see many of the usual guys planning to go and Loobie IV, good stuff Jerry.
Oli, Diane and I spent a few days on Tigerfish in Guernsey last summer we stayed in the inner harbour of St Peter Port. Nice place to stay but the tidal issues getting over the sill does not make it very practical for going out fishing every day.
The harbour master shared with me some quite amusing stories about boats not getting in right when crossing the sill, all the while showing me scars on the sill recalling how they occured...
The outside pontoons are mostly walk ashore now, these should be fine and early season there should be space. When we were there everything was busy and we were advised to use the inner harbour as it would be A calmer and B we would not be woken up at 4:00 in the morning as a flotilla of yacht's was leaving, there was also very little available space outside anyway.
For a place to stay well loads of choice, nothing is low cost. Lots of nice places to eat.
Diesel is slightly lower cost than Alderney and accessible at more states of the tide, the chandery there is good too.