Pop.
1) Transfer is covered (no need to pay for rental/taxi/Uber, and then pay AGAIN to get to Boardwalk).
2) I am addicted to DME luggage delivery
3) You can “check” your luggage with bell services at Pop and they will deliver it to Boardwalk, vs. having to transfer your luggage yourself via Hilton
4) Because of 3, you save time - drop luggage at Bell Services, then off to the park. Return to BWI later. For Hilton, you’d have to actually TAKE luggage to BWI (or leave luggage @ Hilton and return later to make the transfer.)