so update: Back from Sandusky, in the end we charged to 95% in Erie PA, then arrived at the resort, it was raining hard most of the last bit and the car was fully loaded with 6 people (third row Model S) Arrived Wed afternoon with about 20%. Plugged in and with very little interruption to power but still only a wall outlet. By the time we where ready to leave the park Fri afternoon the car had only managed to get to 61% and was not able to get to back to Erie PA. Chose to go out of our way and hit south side of Cleveland to be safe then stop in Erie PA. All in all it probably cost us an hour out of our way total.
Funny side note. Crossed boarder into buffalo, officer takes passports and counts them looks in the car and says "how many people are you traveling with today?" as he counts the passports for a second time. I reply "6" he then looks at me a little bewildered and then I realize he cant see the boys in the back so I say " oh yeah the other 2 are in the trunk, do you want me to open it", well at that moment his eyebrows lift and he says "they are in the trunk? put the car in park, and no I will do it". Trunk opens the i hear the boys say "HI" when it opens and you can literal hear the relief in his voice when he says "well that's not what i was expecting but that's cool boys, have a fun trip". Lets us leave, but we where all having a good laugh about it.