just been from an external solar system tour starting with EEloo and then moving to jool and visiting with the same craft (but not the eeloo lab, I launched a jool one) vall, pol and bop, laythe I did but with a different lander (it had to work with FAR and DR), mined a lot of kethane on eeloo, vall and especially bop and pol that are very useful for that purpose, there are always at least 2 craft, an orbital mobile lab and science/kethane miner vessel, all highly modular, with external nukes, senior docking ports and so on, the jool lab was recycled in a very recent tylo landing mission with a dedicate lander (also with kethane). prepare your kerbals for a ten year trip