I disagree. I think it works out just fine for your partner to have a similar hobby/passion (biking, kayaking, skiing, etc.) that requires weekend trips, training, etc.
Of course it can work out in all different ways. From my female perspective, I find it much better when the S/O is a climber. My last relationship involved a pro kayaker. In the year we were together, we climbed outside maybe twice. Climbing took a back seat. But thats not to say the relationship failed because of that.
So, yes you are right. Point? Don't date someone who hates camping