Rope trick is a fantastic spell for the use case you mentioned in the question: [to] give a character in dire condition a brief respite against ranged attacks or spells. However, it works better thematically and mechanically to stay in the sanctuary.
How long does rope trick last?
60 feet
You touch a length of rope that is up to 60 feet long. One end of the rope then rises into the air until the whole rope hangs perpendicular to the ground. At the upper end of the rope, an Invisible entrance opens to an extradimensional space that lasts until the spell ends.
How big is the rope in the rope trick?
Anything inside the extradimensional space drops out when the spell ends. You touch a length of rope that is up to 60 feet long. One end of the rope then rises into the air until the whole rope hangs perpendicular to the ground. At the upper end of the rope, an invisible entrance opens to an extradimensional space that lasts until the spell ends.
How does the rope trick work in D & D?
Attacks and Spells can’t cross through the entrance into or out of the extradimensional space, but those inside can see out of it as if through a 3-foot-by-5-foot window centered on the rope. Anything inside the extradimensional space drops out when the spell ends.
Can a rope be pulled into an extradimensional space?
The rope can be pulled into the space, making the rope disappear from view outside the space. Attacks and spells can’t cross through the entrance into or out of the extradimensional space, but those inside can see out of it as if through a 3-foot-by-5- foot window centered on the rope.
Can a Eldritch Knight use a rope trick?
The spell says that only wizards get it, but it’s also available to Gloom Stalker rangers. Arcane Tricksters or Eldritch Knights could also take it. Since it does not say a minimum length of rope or quality of rope it has a few options for interesting uses. A short rope would make for a quick accent.