Did you get my PM? Back to to your resort question:
On the north side, the resorts run side to side. Literally in one driveway, out and 200 yds. to the next. They all run perpendicular to the oceanfront. You could walk between them
w/o gear from Cap't Don's,->Buddy's->Sand Dollar->Den Laman to Eden Beach.
Start at Bari Reef, it's the #1 Fish diversity site in the Caribbean. Pull in at the Bonaire Dive/Adventure sign it's closest to the dive dock. Then drive up to Capt. Don's and dive Cliff/LaMachaca north off their dock. Cliff is one of the few vertical walls in the area. When we dove it the current gently blew us right back to the divedock. CD charges $5. but you get to use the showers/lockers there. You could also maybe continue on south to Buddy's depending on your air consumption and truck placement.
I've never dove Buddy's reef, but I've read there's often Sea horses found around the mooring(they don't move much...) In case I forgot to mention it in my PM, change tanks at Buddy's, they have a drivethru in the back of the property.
fwiw, after 2.5 dives on BelMar's house reef, we'd had enough of it. How many Puffers and Turtles can you stand?
And one day do the Salt Pier, set it up through Buddy's as a DM has to go. Early morning when the sun is streaming through the pilings is best, it was a featured photo in Scubadiving recently.
From there, head farther south also, Invisibles right next door and Vista Blue are high on my list. As you get near the 1st reef at Invisibles look for the eels, there's hundreds of them. Current can be ripping from Vista Blue to the Lighthouse in the PM though. Most sites from White Slave south to Red Slave are called advanced.
Pink Beach is probably the nicest beach on Bonaire and drive down to the Slave huts during your SI. fyi, once you leave BelMar going south, there's no food, shade or water anywhere.