Talk:Invitation Letter/@comment-2601:280:4000:34:587B:6FCD:D5CB:EBD4-20190217175216/@comment-38109392-20190217181703

The South Block Trade Post is in the Eufaula Desert.

Not sure if there is a Relationship point requirement, though I assume being closer to them would likely increase the chance of them accepting your invitation (similar to certain other Special Gifts, like Heart Knots).