Exodus 16:29c Everyone is to stay where they are on the seventh day; no one is to go out.
There are a number of interpretations:
Strictly stay in position all day. This is an extreme view.
Stay inside one's tent. Do not visit neighbors.
Stay inside the Israelite camp. This is the traditional view. Do not travel more than six stadia, a sabbath day's journey.
The first two were refuted by Jesus in Luke 13:15
The Lord answered him, "You hypocrites! Doesn't each of you on the Sabbath untie your ox or donkey from the stall and lead it out to give it water?
The last one is supported in Acts 1:12
Then the apostles returned to Jerusalem from the hill called the Mount of Olives, a Sabbath day's walk from the city.
How to interpret Exodus 16:29?
Exodus 16:29c sounds like an over-correction when taken out of context. It needs to be checked by Deuteronomy 5:14 where the emphasis is on rest and not on distance:
but the seventh day is a Sabbath to the LORD your God, on which you must not do any work--neither you, nor your son or daughter, nor your manservant or maidservant, nor your ox or donkey or any of your livestock, nor the foreigner within your gates, so that your manservant and maidservant may rest as you do.
Note that at one time, the tent of meeting was outside the Israelite's camp.
Ex 33:7 Now Moses used to take the tent and pitch it at a distance outside the camp. He called it the Tent of Meeting, and anyone inquiring of the LORD would go to the Tent of Meeting outside the camp.