I have a powerboat and have entered Hillsboro more than a dozen times in the past 6 months. Under
power, the inlet channel is very well marked and easy to navigate. Deep
water should not be an issue. Your real problem is going to be where to
anchor. There is an anchorage in the basin before the draw bridge, but it is not going to be "still" because of the traffic going in and out 24-7.
There are few good
anchorages both N and S after going through the bridge, with a nice area just south near a beach. There are few places to go ashore, and it's along walk to anything resembling a restaurant or store unless you go south to the
boat ramp or one of the
marinas just before Atlantic Ave. You could go north to the Lighthouse Point Yacht Club (a bit trickier, but doable).
If you can make Ft. Lauderdale, that entrance is 40'+ and there are tons of quality
anchorages,
marinas, etc. Facilities are much better.