I'm going away for a week in August, with very little chance for structured exercise (there will be some fun sports going on).

To make the best of it I'd line to put in a week focused on base/endurance just before the holiday. Do you have any advice how I can do better than just doing 2-4 hours of riding every morning?

Also, do you think compression pants might help recovery, because I have to sit in the (home) office the whole day after the riding.

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Bikes: Raceur, Beateur

Ride as much as possible, eat well enough to do so, and do whatever recovery modalities you can- ice baths, compression, massages, etc.

Taking a week off will not and should not affect your overall fitness if you are training now effectively until your August vacation..
Compression pants

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I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree