I don't know how much the 2 of you weigh but we took our adult kids/spouses (8 of us total) and none of us could go tandem because our combined weight per couple was over the limit. We are not pooh people but they had a pretty small weight limit for their tandems.
We were quite happy with our experience. We did the deluxe for each of us. Since I did 8 of us at once, we had a boat to ourselves and we were out there a couple of hours. It was a great time.
Don't forget to bring cash for the gratuities. You have the boat captain and the person who puts you into the harnesses.