At the beach yesterday we packed a cooler. I had lots of water and applesauce. (I'm still on pureed). At restaurants I just order soup or 1/2 order of crab legs. . If you can bring in water maybe freeze a couple bottles since you'll be there in August. Just stay hydrated in the heat and I think you'll be fine.
I am 2 weeks post-op and am on vacation in Florida right now. We went to the beach all day today and some shopping. Yesterday we went to the zoo. I feel great. I wouldn't think you'd have any problems 10 weeks out.