If you are staying at Cap Juluca...they should stay at LA Samanna!
Hopefully you won't need it, but we stayed two nights at Bleu Emeraude on Grand Case and loved it. Spotless rooms, lovely views, quiet end of the beach, but you could still easily walk to all the fine dining.
Mary’s Boon is a great little place. Just don’t get a “basement” room. Beachside Villas is another awesome little place. Divi Little Bay is a large resort, very good swimmable beach, pools, a few restaurants, etc. You would definitely want a car for any of these places. We use Kenny’s car rental. St Martin is very different than Anguilla, but we like them both for different reasons! Good Luck!
Thank you all!! Mary's Boon it was. Ellen, thank you for the fast recco! My daughter and her friend stayed there last night and had a lovely evening (and could go out to dinner - no quarantine!!). My husband, son his friend and I traveled to Anguilla yesterday. My daughter's friend coming over now, and my daughter tomorrow. GBX has been fantastic...3 Ferries in 3 days when we only planned for one! But it will be fantastic to all be together at Turtles Nest, enjoying Meads Bay, Straw Hat and Picante when we are all finally in the same place to the same time!! Again, thank you fine people, esp. Ellen, of this forum.