On the Grand Asia Exploration last year, Explorer docked at Laem Chabang overnight Feb 25-26. We weren't planning to take the 2-hour bus ride into Bangkok but changed our minds at the last minute. And are so glad we did. The Grand Palace was magnificent. Figured we may never get back that way again, so we are happy we went -- exhausted, but happy. Since you'll be in Bangkok early, you may be able to do this in advance without the LONG bus ride. We have friends who did the Sanctuary of Truth and really enjoyed it. We also did the Pattay Floating Market. Not sure I'd recommend it. It's a "created market" for tourists. Bill called it "Disney-fied". 😂 But it had some interesting shops and food stalls. Jealous of your trip this Spring. We LOVED our Asia trip. Fingers crossed you'll see cherry blossoms.