Official Sea Pines policy regarding Monarch visitors:
I called one of the front desk managers at Monarch (a former front desk guy at Grande Ocean, btw, whom I've known for several years),
and he told me the "Sea Pines Gate policy" for those staying at Monarch specifically.
(Other Marriott properties inside Sea Pines may have the same policy, but I did not ask that so I don't know. I would assume so however. )
There are TWO instances whereby you can avoid the initial Sea Pines entrance fee of $9, and those are:
If you are staying at Monarch (1) using Destination Points or (2) by virtue of your Monarch Ownership Week(s). You simply
drop by 32 Greenwood Drive to obtain a Sea Pines gate pass for your vehicle which allows free entry, initially and during your stay. Staying by any other means disqualifies the free initial entry, but you still get free entry during the stay.