we stayed about 0.5 mile out of town, and the walk was level throughout on rd near seashore

Well I can’t really tell because we used an airport shuttle to get to the resort. But I think it wouldn’t be bad if you have an international driving license if you want to drive there :)

Don’t know about buses but loads of boat trips are available. Rather than book through your hotel or tour operators just go down to the water front in the evening ( 7-9pm best). All the boats are in and you can book direct. Only works of warning is book early, we went down 2nd evening of our holiday & a lot of the days were fully booked. Prices vary hugely depending on the type of boat. Anything from luxury to ferry available. If it’s the bubbles your going to see at ‘Bubble Beach’ I wouldn’t bother, it’s a small area of rather unimpressive bubbles. If it’s the water sports & other beach fun than definitely worth a visit.

Kardamena beach is so close literally a few minutes walk depending where you are. We stayed at Phillipos Apartments and the beach was right opposite us. The shops and transport links are probably a ten minute walk if not less.

Dall’ aereoporto di kos a Kardamena hotel Mitsis per farti un esempio il costo è di 22/25 €, il bus non saprei dirti. Comunque se vuoi girare L isola in piena libertà senza dover attenerti a degli orari credo sia più comodo affittare un auto o quad.L acqua è stupenda e limpida quindi puoi tranquillamente immergerti

I think it is near to Anemos Restaurant and Banana Beach Bar:)