You have to put yourself in their shoes and try as much as possible to use logic, refer to the lease, but also be understanding where it makes sense. 

Food for thought, I can go on forever but this is the mindset I would have if I was in your shoes.

Some common ones that come to mind in addition to a hot tub are a cedar sauna (gotta lean into that Minnesota sauna culture - check out Cedar and Stone out of Duluth for some really cool sauna ideas), snow shoes or cross country skis, or even just a nice outdoor firepit area with tons of firewood (you could also include complementary s'mores supplies for every reservation).  

NEW TENANT GIFTSHere's what we give new tenants.....Cleaning Bucket with Cleaning Supplies:white vinegar, baking soda, awesome degreaser, disinfectant wipes, carpet spot cleaner, magic eraser, all purpose cleaner, scrub sponge.Tote Bag with Useful Items and Tools:hand soap, paper towels, plastic garbage bags, toilet paper, toilet plunger, Zip-It (strip for clearing hair clogs from drains), plastic clothes hangers (6), shower curtain liner (good quality cloth one), laundry detergent, dish soap/dish detergent, cutting board, "Freeze the Grease, Save the Drain" kit, “Recycle” bag for collecting materials for recyling, magnet with our name and contact information, picture hangers.Refreshments In the Fridge (for move-in day): several bottles of water, healthy snacks, bottle of sparking cider with a welcome note attached.Larger items: Welcome mat, shoe tray.

I've been in your shoes.  

In your shoes, my goal would be to get to know folks and make connections - Open the door to have them communicate with you should there be any problems with the property and ensure they call you (not the cops).  

And strolled over around that area.

For example, near a college campus 5 blocks away is walking distance, but 10 blocks likely means a bus ride.Put yourself in the tenant's shoes and decide what's too far and what's not.

Hi Brady, I was sort of in your shoes a year ago!

With high real estate prices & equity markets, it seems like a lot of people are just waiting for the other shoe to drop.