400 is our max, done only under duress (that reads, leaving the north for the south in January!! and we have to FIND a campground that is open and we are in a big hurry to get someplace warm enough to put H20 in Montana).
Preferred is 250 to 300 MAX.
That said, we all have different tolerance levels, therefore can drive different distances.
This has been discussed before, but is probably buried in the archives.
Have fun on that trip!
