I’d say that if you are confident that you won’t see needing your hotel id for emh, and tickets for fastpasses, then I wouldn’t bother. We stayed at Swan, and bought them because of some of the reasons you mentioned:
- Cheap souvenir (we’ll probably make a wall hanging with a few photopass pics and our magic bands.)
- We ARE planning on going back within the time they should still be functional.
- We have a kid in tow
- I figured it would be MUCH less of a hassle with the kid especially. (actually, I used the kid as kind of an excuse - I figured it would be easier for me - I have a tendency to lose anything I possibly can.)
So with park access - for EMH, if you link your magic band - you won’t need your hotel id. Your magic band will have that info. Not a huge deal, but it is another “pro.” I mean, you’ll probably have your hotel id card on you no matter what. (I’m pretty sure it’s just the room key card.)
I have no regrets for buying mine, I think it was the right choice. It sounds like you think the right choice for you is to not buy them. You’ll be fine. Just have the tickets at the ready for park entrance, and also for fastpass entrance. Just take them out on your walk to the attraction. I just know that in my case, I’d probably have to search every pocket for ours, but that’s cuz I’m disorganized. Having them all on our wrist at the ready was worth the 13 each for us, but the other things did play into it - especially the going back to use them again thing. We’ll probably stay at Swolphin too. I thought the hotel was fantastic (and for the comparable amenities, worth every penny.)
Also, I’m pretty sure that one of the gift shops on the Swolphin property sells them. Just call the desk and make sure. I’m pretty sure that field that question every day. You can also order them online from a few places. I can guarantee the disneystore will ship them to you. We bought ours a few weeks before the trip and had them all linked and ready to go before we got there. We stopped at the disney desk and had them make sure everything was working.