So glad you enjoyed the Hilton Eif . Really looking forward to going back next year.
I have a hilton honors card. We have only used it for one stay that we booked direct a couple of years ago which pushed me up to silver membership but I have managed to gain extra points over the last couple of years by filling in surveys etc with
http://www.Erewards.com and retain that membership and continue adding to my points.
I have just booked direct again and gave them my HH mumber at time of booking . On my confirmation email it says due to my HH membership I am to be given Free upgrade to delux and VIP status , whatever that might be . Probably free pop and beers in your fridge and a basket of fruit .
It wont harm to give them your number in advance . You wont gain any points but you may get other benefits . I would email them a couple of weeks before you go .give them your number and ask if you are entitited to anything extra.
Last year we stayed at the coral hilton in Nuweiba but booked direct with Thompsons . I did give them my number at checkin and we only had to pay a couple of quid for a late check out room .
lyn