Welcome to the Forum Paul & Sally.
Arillas ....Well where to start, Food, I have yet to find any tavern/restaurant where the food has not been of quality, as your wife is veggi then I suggest asking what they recommend where you are eating, You will find that locals are more that happy to help you and they will not disappoint,
Sunbeds on the beach? not sure this year as they were not out when we were over early May but previous years they have been set out by the businesses on the front and prices have varied but we have found that the prices have held around 7-8 euro for 2 beds and a sun umbrella for the day.
You could also use the pool bars where you can use the facilities, just settle down enjoy a drink or perhaps a snack.
Car Hire is available in the village, we usually use Theo at Arillas Cars although July will be busy and it may be best to pre book
http://www.arillascars.com/Don't think Gary is running the boats this year in Arillas but just call into Sharon's pool bar opposite the Marina Hotel and she will be able to tell you more.
Have a fabulous holiday, we are there from 16th July so if you see us about stop and say Hi.
Where will you be staying?..... Just one more thing, Arillas has a habit of grabbing you and keeping you, don't be surprised if you get caught in her web