Unfortunately I won't be on my boat for New Years, so I'm a little envious of your plans. If the weather is nice you've got something to look forward to. Sailing down to Galveston is easy enough. Definitely do not go between Redfish and the mainland, as you'll surely run aground just after you pass Redfish. There are plenty of places to cut through to the ship channel, and it's wide enough for you to stay out of the way of any marine traffic. Just stay clear when two ships are passing! Unless you're planning to anchor in Offats Bayou, stay out of the ICW, as there are shoal areas near the island to trap the unwary. Also lots of towboats and barges. I gather you'll want to dock near The Strand, in which case just go down the main channel between Pelican Island and Galveston. There is plenty of water, but keep an eye out for ferries and offshore support vessels.
Have a great New Year's celebration!
S/V "Southern Cross"