Hawaii at 8 weeks!

I had an ectopic in November, doctors didn't know it was ectopic, and it burst. Sending me for emergency surgery. I lost a lot of blood and hang a month recovery. My hubby and I decided we deserved a trip to Hawaii and we would start trying again. Well God had another plan and we're pregnant! Our trip is already booked and (if all continues to go well) I will be 8 weeks when we leave for 10 days. Any advice for the travel? Or things to do or not do in Hawaii? We both have never been. I had read something about the volcanic sulfur on the big island can be dangerous, but my doc said she's never heard that I'm fine.