Congratulations on your purchase! I have been looking at the Super 8 150 as a "first scooter" purchase for a while now. Kept my eye on Facebook Marketplace and Cycle Trader this past summer and fall seeing what they go for and getting an idea of what kind of inventory comes and goes on the used market. Seems like it's fairly active, and if you have cash and are willing to be patient, you can find some of these machines with very low mileage at great prices.
I just think it would be fun to have a scoot for warm-weather riding, and I think that 150 size would be great for just cruising around the back roads in my area. No plans for any long-distance driving with it, though, as you note, its size is perfect for trailering along on vacations and such without much hassle. Would be a cool little machine to take to the beach or a camping trip in the mountains.