Cap Juluca again

For those of you who are going, or have gone to Cap Juluca, do think it is a waste not to also stay a couple of days in St. Martin. We wanted to do 7 nights in CAP and 2 in St. MArtin , but now we were thinking of doing Cap for 8nights and forgetting about St. MArtin. Is it enough just doing St. Martin for day trips??
Thanks for your help!

I did both for our honeymoon. We stayed in St. Martin for 2 days then Cap Juluca. I enjoyed St. Martin a lot. I think either way you won't be disappointed.

ETA: You can also do a day trip to St. Barts. I didn't know that