Is there someplace I can enter in a MAC address so the hotspot server automatically lets it through?
yes, in hotspot ip bindings
ip hotspot ip-binding print
Flags: X - disabled, P - bypassed, B - blocked
# MAC-ADDRESS ADDRESS TO-ADDRESS SERVER
0 192.168.100.0/24
place this mac addr on the #1 place
/ip hotspot ip-binding add mac-address=00:00:00:00:00:00 place-before=0 type=bypassed
Karma for you!
Thanks.