I made this mobile base a while back that could take seven kerbals along Eeloo's surface and get some sweet science points.
As small as the base itself is, the delivery craft has the delta-V to make it all the way to Eeloo and safely land the rover on the surface. All I need to do is get some scientists to process the data gathered on Eeloo, and we're cooking.*
* ironic since Eeloo is practically a giant snowball.
Craft file: https://kerbalx.com/Mars-Bound_Hokie/Eeloo-Mini-Mobile-Base
(Also comes with cargo slots)