Anne and Matt,
A bit of self-deprecation never did anyone any harm - I'm assuming you are Welsh and not simply a pair of Scots lambasting the Welsh
Weight was a bit of an issue. We packed on wine box (over 3 kg's) in one case and balanced clothes between the two as best as possible. With only 20kg each we were over by about 4-5 kg at the outset. So, we both ditched some clothes on the assumption that the hotel (2nd week) would have laundry facilities.
A further 3litre wine box purchased in the dep. airport duty free was not counted as part of the weight as we'd checked-in by that stage. You could therefore buy 2 wine boxes in this way - but choices are limited at most airports. So, to answer your question - the wine won by a (thick) head.
Tipping: a constant source of embarrasment to us Brits. On the boat (1st week) it wasn't appropriate to tip at the outset. Apart from the room steward (who was great) and the waiters (also great, but what effort's involved in removing finished plates) little contact was made with other staff. Drinks etc. are bought on the room credit facility. Therefore, on the penultimate day when the rep's gave out empty envelopes we put £25 (sterling equivalent - 250 Eg £'s) in the env. and handed in to the rep. We also privately tipped the room steward several US dollars in addition.
At the hotel, this was a different setup. Our first encounter was with a drinks waitress near the pool. Whilst the sangria Viv had was pretty naff, my beer was OK (Meister Beer - local). I tipped the waitress $2 and the following day, a further $2. This ensured her attentive service and she very kindly reserved on three evenings one of the outside dining tables (only about 6) for us. I probably tipped her about $12 throughout the week and her service was first class. Likewise, a dollar or two per day for the guys setting-up the umberellas and loungers alwways ensured we had our chosen spot every day and they moved the umberalla as the sun moved. Mid-way I tipped the room steward as he again was brilliant.
The crass advice has to be, tip a reasonable amount at the first opportunity those members of staff who are likely to be looking after your needs throughout the week. This is likely to guarantee you better service than those who don't tip at all (there are many).
If the average Egyptian hotel worker earns the equivalent of about £15 per month a tip over a week of, say, £7 is a massive amount to him/her and not a lot to us.
Take pens, soap and playing cards for the kids as well - although Sharm might not have as many poor children as Luxor.
Have fun,
Mike