Lessons

Three months on the road, almost 15,000 miles, we came up with several lessons that we need to remember before our next big trip.

1. Find a good campsite, stick around longer. We stopped at a lot of campgrounds, usually a state park or provincial park or a national park, with only a few private campgrounds. Too often, we only spent one night and then moved on. The plan was to spend two days (or more) almost everywhere, and we still think that is the better way to travel. Heading West we kept moving because the wind was keeping us off the SUPs; we should have stuck around and kayaked on the SUPs.
2. Avoid lakes on weekends. We had no reservations, and finding a campsite on Friday or Saturday was always more of a challenge than other days of the week. And everyone wants to be on the nearby lake on the weekend. We need to pay more attention, and not try to find a campsite on those days.
3. Plan our clothes better. We brought clothes for hot weather and cold weather and wet weather. But we didn't plan it out well enough. More t-shirts, more socks, more layers.
4. Plan our kitchen better. We brought stemware and napkin holders which we never used, and a fry pan that was a bit small, and a spatula that was too soft. We brought the Sodastream, but not the tonic flavoring.
5. Plan our storage better. Having the three bins in the back on a sliding shelf was wonderful, but we need to be more clever about what we put in each. We didn't need to bring the milk crate in one, and we had more water bottles than we needed. Likewise, with a shelf above the three bins, we could cram the SUPs, and then the bikes could fit inside on the other slide. The bikes got way too dirty on the outside rack. 
6. Version 2, Screens. The back door and sliding door screens were wonderful in areas with mosquitoes, but they weren't perfect. In particular, the back screen suffered from too many gaps by the magnets around the top, and it kept getting in the way if we didn't take it down. With a better seal and a way to roll it up out of the way, it could become a permanent addition. The side screen was closer to perfect, the seams lined up better for a good seal from the flying teeth, but we couldn't leave it up and close the door. Perhaps we can improve on it, too.
7. Better power management. We were plugged into shore power for only a few nights at the beginning of the trip; we lived on the house battery the rest of the trip, charged only by our one 150w solar panel. We would have liked to use the InstaPot more. We would have liked to use the ceiling fan some nights or the box fan. We would have liked to pump up the SUPs more often. We need to get a second house battery, and perhaps replace the existing one if it's dying from overuse. There's room on the roof for a second, 100w solar panel to better charge the two batteries. The Sprinter has room in the engine compartment for a second battery, and also a second alternator. It may be that having a second alternator for charging the house batteries might be a good way to ensure we always have the energy when we need it. Ideally we will learn how to sleep comfortably without air conditioning. 
8. Build a better awning. We used our awning in White Springs, and we gave up on it after one of the magnetic hooks broke, but it wasn't working even before that. Our new plan is to sew-in bar magnets to one end of the fabric to tether one end to Ernie, along with a more robust way to hold up the far end. 
9. Look into a Cellular Extender. In the US it seems that every State and National Park has minimal cell service, but putting an extender on Ernie's roof and then repeat its signal to our phones is a great way to be connected on the road. They're pricey, but being off the grid so much is unpleasant. What was surprising was how good a signal we got in the Canadian parks.
10. Three months is enough. We cut it short a bit because of my back pain, but we were ready to be home anyway. Another week or two would've been doable, but we were ready to call it a good tour, and start preparing for the next one. We needed time and bandwidth to find better boondocking resources, better lighting, better cell, better batteries, better storage, better living.