Hi Jason, and welcome to PT! I saw your introduction post but I've been out of town and am catching up so only replying to certain threads. Anyway, as for traveling, I think it's great that you want to take your two little sweeties with you. When Tubby was very young I lived 1/2 hour to 45 minutes from my parents, and we went home on a regular basis. Unfortunately Tubby was never one for crates, so I just left him on his leash roaming the car - but like Laura says, I wouldn't recommend that at all. I think a soft sided carrier that they can both fit in would be great and they will feel more comfortable since they seem to be really close siblings. For this duration of a trip I don't really think you'll need a litter box - unless they seem prone to car sickness. One thing I've noticed that helps with Peanut in the car is I make sure she can see me. This seems to comfort her and then I can look her in the eye and tell her it's ok.

But my point is that since they are still so young, if you start visiting regulary with them now, they will become familiar with car travel and familiar with the different surroundings of your parents' house, and they will actually start enjoying visiting "Grandma and Grandpa" because you may not know but grandparents spoil their furry grand kids as much as they spoil their skin grand kids.

Good luck and let us know how it goes!