I/we do this all the time. It is really satisfying.
All the advice you have received is good.
Make sure you have two lengths of chain (not to heavy) approx1.5 Metre long with snap shackles. You will find them very useful.
If your wife likes swimming it should be no problem to encourage her to take the line ashore and attach to a rock or tree that you have identified on a trial run, watching the bottom as you go in.
Go back out, reverse in whilst anchoring and when you reach the spot take the line/chain with a fender
attached to the rock or tree. Make sure you have plenty of line. Whilst the line is being taken you can gently reverse against the anchor to control the boat.
Once the first line is on the second can be done at ease.
If you have to do it singlehanded; Anchor and reverse in as above without taking the lines ashore. Let the boat swing free. Take the line ashore attach to shore and then return towards where you think the boat will lie when finally moored, paying out the line, now with a fender
tied to its end and drop over the dinghy
Return to boat and reverse up to fender and pick up.
Sounds involved but when you have done it a few times it's quite easy. Practice when no body is around.
The bay's to the N of Messalongi and E side of Ithika are perfect fit it.
Enjoy your boat.