If you have luggage, we found it best to leave that with the baggage storage company in the marina. We then spent the next several hours walking around town and enjoying ourselves before walking to the unit. The condo is in the first building as you walk into the complex, so total time to walk from downtown Avalon is only about 30 min. There is a good hill at the end, though, so you can also take a taxi cab up there. Once we gave our info to the guy in the guard shack, we easily found the unit, got they keys to Helmut's golf cart, and drove back to town to pick up our luggage. We had stored two suitcases and two carry ons there and our total for a day's storage was $22 (they could have delivered it to the condo for $40 total). On move-out day, we did the reverse - again storing our bags at the depot. To find the gas station, continue on that same road past the marina - we just gassed up after dropping our bags and before our final lock up of the unit (the gas tank on a golf cart is under the rear seat) and having a nice downhill stroll back into town.
Another note - if you're as in love with that patio as we were, please know it's just as beautiful as it looks, but it is technically a shared space with the neighboring unit AND has a staircase that connects it to the public walkway. I assume this is a fire code thing. The entire development was pretty deserted while we were there, so it was still very private - but it's not TECHNICALLY a private patio.