Well, here's 2 outdoor omni-directional antennas for a start. One is 8dBi and the other is 10dBi. The 10dBi MIGHT cover the whole thing at once if you mount it on top of the campground store. But most routers do need 2 of them. You'll have to check.
Gotta start somewhere..
Just a thought.
Mark NØLXX
First computer built - 286-16 MHz. running DOS 3 and Windows 2.0 BETA
BBS SysOp for 6+ years (2 lines, 1 computer)
Antec Mini P180 + OCZ StealthXStream 500 watt
GIGABYTE MA78GM-S2H + AMD Phenom II 720 BE OCed to 3.4 + 8GB G.Skill PI Black DDR2 800 (CAS 4) +
Sapphire Radeon HD 4830 1GB + Windows 7 Home Premium 64-BIT