Some here (on FT) and elsewhere have actually stated that you could NOT have your food even delivered! Yes, I did think that was obviously absurd but it has actually been posted and quite honestly I didn't believe it. I should also note where I live on the Big Island delivery services are non existent anyhow necessitating my going shopping for food on own. I am sure I am not the only one with this issue. Hawaii is not Honolulu...
In regards to the beaches being public, yes legally ALL beaches are public in Hawaii, however, without going into specific I know of and have friends and family who own beach front property and have returned to the Island. I can tell you they have/did definitely using the beach during the "quarantine" period. Having said that, while again it is legal to use the beach behind their property in practice no one does. Also, given the large open area allowed to them the chance of contamination in that environment is probably near zero. Just say'n and not looking for a discussion on whether it is justifiable or not, everyone has an opinion on that.
On a separate and disappointing issue it appears the quarantine has now been officially extended to July 1. I plan on returning in July regardless of a quarantine and just biting the bullet as I now have critical issue to attend to business and otherwise that cannot wait any longer.