You could consider the way I did these 3 hills with a group of friends.
Started at Ben Nevis about 0900, I made it to the top in heavy snow and limited visibility, back down to pub, few beers, jumped into mini bus. Arrived in Carlise and had a great night out.
Set off after a full English breakfast, got lost on way to Scafell, but eventually got to hill, up and down with sunburn thrown in, went to pub at bottom for a few beers, drove to Llandudno had a great night out.
Set off after a terrible full welsh breakfast, arrived at Snowdon , walked up in really windy conditions, went into cafe at the top for a beer, back down and into minibus arrived in Blackpool and had a ARIGHT night out, forgot what the place was like.
Up next day and back to Glasgow.
Not really the type of challenge your looking for to get fit but your liver will get a good workout.