Valavia 1 & 2 are twin missions, both with the goals of sending people to Cylero and allowing them to safely return.
Valavia 1 consists of one large permanent habitat that is landed before the crew lands. In the habitat is a crew compartment that houses four, and a depressurized storage section that can be opened to reveal two deployable solar arrays, one coms payload, one RTG experiment, and one ISRU module to produce fuel for other vehicles.
Valavia 2 consists of one Avail CSM and one Verilius MEM. The lander holds four, and the CSM holds six. The MEM has more than enough fuel to land safely at the desired position, and certainly more than enough to return to Cylero orbit and rendezvous with the CSM. The CSM is capable of returning to droo and landing safely, granted you know what transfer windows are.

IMPORTANT THINGS:
When landing the habitat, after Aeroshell Jettison, turn on “Landing Mode,” it will make your life way easier
In the habitat, the ISRU module ONLY generates fuel when timewarping, credits to BM94 for the funny engines
In the habitat, to deploy the ISRU module, use Slider 3 THEN Slider 4, afterwards you can detach it from the hab
In the habitat, the small deployables are very buggy when you deploy them and will probably clip into something, i tried fixing this to no consistent avail, you’ll have to rely on trial and error

THIS POST CONTAINS ONLY VALAVIA 2
Link to Valavia 1, the habitat