Thanks for the info. Every time I went to the RV area via some other link it stated I would be on a waiting list.
I have not tried it so can't be sure but it sounds like you were looking at the regular plan with the mobility option which could easily be waitlisted as you should have full speed at home. The RV plan should not be waitlisted as you are a lower priority / slower speed when busy. Early reports the speed still seems ok but it could get bad. I have been in a few campgrounds where cell signal was great but throughput was unusable, so it would probably still be better then this.