Leaving no one on the boat isn't a problem.
You check the anchor first thing on the dive,
and the right anchor (a Danforth IMHO) isn't
going anywhere. And you put out enough
scope so that any place the anchor can
reasonably drag to it will still be on the
bottom.
I wouldn't worry too much about braining
a diver with the anchor. Most places you
dive with a boat won't have any beach
divers. So if there aren't any boats, there
aren't any divers. If there are any boats,
find their bubbles).
Don't worry about rebreather divers like me.
We'll just stuff your anchor way down in a
deep hole (no kidding, I darn near got brained
by Monterey's senior dive boat captain, and
I stuffed his hook in a hole).
If you coil the line clockwise in a five gallon
pickle barrel, it will run just fine.
I regularly dive sites from boat, nobody
on board, from sites I couldn't swim home
from. Everything in life is a trade-off.
Zodiac (note spelling) is only one brand, and
not the best today as they are made of
PVC. You really want a Hypalon inflatable.
PVC isn't very tolerant of sunshine and
gasoline.
Tank racks in an inflatable are problematic.
The standard solution is Pelican baskets,
which suck, especially with booted tanks
and with BCs. The racks from East Coast
Plastics, aka RollControl, and distributed
by Trident are great on a hard boat, but
I haven't seen a good solution on an
inflatable.
http://www.ecpdb.com/rollcontrol.htm
