P-pod for dry camping?

Will do.  I ordered a new bathroom scale for the trailer to measure the tongue weight directly, which we'll be able to adjust with loading (there's plenty of storage at the rear of the trailer where we could transfer weight to lighten the tongue if needed).  I do have a hard time believing the manufacturer's dry weight rating could be way off (if only for liability reasons), but eventually we'll get it to a scale.

Yep.  My experience with towing our trailerable sailboat (a bit lighter but in the same ballpark) is that it only ever got squirrely when the tongue was underweight due to loading (just as you'd expect).  I don't plan to make any big changes with the RV given that I know I have a workable configuration now, but it'll be interesting to see where things are.  

I just went out and measured the tongue weight at 285#, so between 9 and 10 percent.  Given that, it's probably worth shifting some more weight forward next time (which is easy enough to do -- there's a lot of storage up front).  

By all means move some weight forward, but go weigh the trailer so you know where 11% is,don't assume a trailer weight based on FRs numbers.

The other test is to check to see that the trailer is stable in tow and that the yaw oscillations are well damped. Without any antisway engaged make a lane change in a straight road at highway speed. A well balanced trailer will make at most one swing before coming back in line behind the TV. Start slow and be very careful doing this, keeping a hand on your manual brake control in case things get out of hand. See attached demo



sway

My test suggestion was to look for inadequately damped yaw during sudden directional changes, not necessarily whether it was comfortable or not. That's kinda subjective. But it sounds like if you weren't comfortable then moving more weight onto the tongue is still a good idea.Then point is to have a stable rig and not to have to depend on sway control to save you in an emergency.

My trailer was 300 lbs heavier than I expected it to be, carefully accounting for all options and items on board. Just saying.

Up to you of course if you get an actual weight on that and your 3 axles so you can check against your trailer and TV specs but it's not hard to do and you can often do it for free at your county waste transfer station.

Bottom line is that you have a marginal TV for that trailer and have already gone to a lot of effort to keep your weights down, great job. I congratulate you for that. Most folks wouldnt. Why not follow up with actual weights and confirm you've nailed it?