My husband and I tried for a few years, went to the fertility doctor who found nothing wrong, tried a few things, but to no avail. We decided to just relax, have a lot of fun and revisit the effort in a year or so if nothing happened before then. We went on our first trip to CSS in January 2013 and loved it so much, we booked again for June. About a month after booking, we found out that I am pregnant. We still went on our trip in June and had a wonderful time.
It was super relaxing, the food was great, the staff was wonderful, as usual. I was 4 months pregnant when we were there and did a lot of sleeping. Don't worry about whether or not you'll feel sick. Every pregnancy is different and I personally didn't experience too much sickness. Just relax, enjoy your time together and no worries! I know that everyone tells you to relax when TTC, but it really is the best advice, although the most difficult to follow.