As a Marriott member since the 1980's and have been Platinum Premier for the last six years and now Lifetime Platinum starting this year maybe I can help. Depending on your points you have got, I would recommend the travel packages for hotel & air travel where you can stay for a week (7 days - I have done this many times for Hawaii trips) and also get airline points (1 for 1) into your airline account up to 120,000 points. Package points vary by the category level of hotel you select and the amount of airline points from 50k, 70k, 100k or 120k
Ditto. Figure out where to stay and get the category travel package reward that you need for that hotel. I've used them for Hawaii and Paris. The 1:1 airline miles can't be beat. Only disadvantage is that you can't split your stay amongst different properties. But just find someplace you don't mind being for a week.