Sunday would be inside of my house. You'd have to be able to check the inventory to see it, naturally!
Really though, as far as awards go you could make them calculate by level I would think. There are quests that provide xp based on what a player needs to up a certain number of levels or percentage of levels, so that's already in the coding I would think.
Gold could probably scale based on your xp per level too. I don't know if something like a flat 30% of needed xp in the form of gold would work at the lower levels (yes, super high levels would essentially be capped as they are for xp) or if a sliding scale of sorts would work better, but it'd be the basic idea.
For items, maybe something along the lines of fishing where you can't go too far over your own level? Whether the same "non fishable" items would be excluded or not... hey, more details!
Definitely need to cap at a single prize per FT day or else people would be telling friends or just grabbing more with alts. You could probably even keep the prize in the "all levels" areas (i.e., no clan maps or maps requiring a certain level to access) because why not? Maybe a level 5 has the advantage over a level 5k some day while recovering the stolen sword for the kid in Ashdown and the next day it's on the fairy island...
Overall though, I like the concept!
Old soldiers never die, they just fade away.