Re: low water trailer up or just trim all the way up??
I'm from South Florida and motoring up to sand bars is a way of life. We do (did) it several times every weekend. Marine 4003 described it perfectly. Always use 2 anchors - 1 stern and 1 bow. Keeps you straight and prevents you from washing up on shore when either the tide pushes in or from other boaters wakes. Practice idling in and killing the engine before you hit sand in the front, the drive should still be in deeper water. Raise the drive (engine off). Have fun.
I don't ever use my drive to secure the boat, that's not what it's there for.

I'm not sure if your in a lake or tidal water. If tidal, get the drive up and keep an eye on the outgoing tide (beached boat). Lakes not a problem.
Watch the water near the shore line for submerged dangers. I hit sunken trees and stumps with my drive by accident, fortunately, no damage.
