Last year we did not encounter any mosquitoes and there was no need for a net. In general, February is in the dry season, and there aren't many insects around. The only place you might encounter insects are in Bahar Dar near the lake.
For the trek on the Sunday, do we need walking boots or are sandals/ trainers ok?
The trek on Sunday is over uneven ground. You might be more comfortable with hiking boots - but you could certainly manage with any good walking shoe or trainer. I will be wearing hiking boots throughout the trip - as the roads and pavements aren't in good condition and I find that much more comfortable.
We are having very mixed advice about yellow fever vaccination. Is it now still advisable?
There is no longer a requirement to have the yellow fever vaccination to visit Ethiopia. The areas we are visiting are considered low risk. I do have the inoculation - but my main consideration is that I will visit Africa many times so the risk is greater.
Ethiopian airlines provides on-line check in but only with an electronic ticket. Will we be supplied with such tickets?
I expect Ethiopian to issue electronic tickets once all of the details have been confirmed with them. For the record - last year no one managed to do the on-line check-in - but the check-in at Heathrow was very fast and efficient.
How much money in dollars / pounds should we bring for meals not on the programme? Are driver/guide tips already included in the trip fee? And have entrance fees been included in what we've paid already?
Tipping is part of the culture in Ethiopia and you are expected to tip everywhere. To make this easier on us all, I will collect money for participants at the beginning of the trip - and will tip the hotel porters, guides, bus drivers etc. as we go along. That way you will not have to worry about it. Last year the total tips budget came to around 800 Birr per-person - which is £25. You can expect this year to be similar plus or minus 5 £.
The cost of meals will depend on where you eat. Outside of Addis Ababa all meals are included at the hotels - so there isn't really a need to eat out unless you wish to. I would budget £5 - £10 per person for each meal out - although in Addis itself it is possible to find more expensive restaurants.
You will certainly want to buy mineral water throughout the trip. This is available everywhere and will cost £0.30 - £0.50 for a litre bottle.
All entrance fees are included in the price of the trip.